SnowDay

Deep snow for the Deep North: untouched snow builds up while it snows, up to 2 m deep, with soft, curved edges, right up to your houses and white on their roofs, but never on your fires. Build straight into it and walk your floors without wading. Trails push the snow aside into banks and fill back in while it snows. Scoop up Snow, a new item, with the Snow Shovel, then pile it up into snow mountains you can dig tunnels and caves into, or build igloos from snow blocks that melt near fires and in warm places.

The Deep North's snow is only about knee to chest deep (1.1 to 1.4 m), its edges are drawn in square steps, and in many modded worlds roofs never get any snow at all. SnowDay lets the snow build up while it snows, smooths how it is drawn, and puts it where it belongs: up to and onto houses, less round tree trunks, but not under roofs or on fires. Snow you dig away goes to the side and slowly comes back while it snows, and the snow you gather builds with. The world keeps one number, how far the snow has built up: take the mod out and untouched snow is the game's own again at once.

Features

• Deep snow that builds up. Untouched Deep North snow starts at the game's own depth and builds up while it snows there, up to the Snow height (2 m by default, the game shows 2.1 m at most; 1.7 to 2 m between drifts, following the game's own pattern), over about 30 in-game days of snowfall. Trails, shovelled spots and banks rise with it, never above the snow around them. Paths, paved ground, the ground near fires and the game's villages keep their snow.
• Not under roofs. Snow doesn't build up under a roof or a floor lying on the ground, only a little way in from the open sky at its edges, and the deep snow that 1.0.0 put inside houses goes back to the game's own (a setting: off, it builds up under roofs too).
• Tree wells. The snow is lower round tree trunks, as in real life: half the game's own right at the trunk, rising smoothly to the full depth about 2 m out (a little more round big trees).
• Seasons. With RustyMods Seasonality, the seasons change how fast the snow builds up: twice as fast in winter, as Build-up time says in fall and spring, not at all in summer, so a year of four equal seasons builds up as much as a year without seasons. Summer can also melt it back towards the game's own depth (Summer melt time, off by default; all settings).
• Creature trails. Creatures walking in deep snow leave trails as players do, sized to the creature, with the snow pushed aside into banks; flying ones don't. Their trails are saved together, so nobody's game rebuilds the terrain for every step.
• Deeper snow is slower. On top of the game's own wading, deeper snow slows players and creatures a little more (up to a quarter at 2 m), and a creature you ride wades like you do.
• Smoother snow edges. The edges of deep snow (trails, shovelled spots, around fires, at the edge of the Deep North) are drawn from a smoothed copy of the game's snow map, four times finer, so they curve instead of stepping in squares, and the deep snow's 1 m steps are rounded off into slopes. Trail bottoms and shovelled spots keep their depth. Where two 64 m pieces of ground disagree about the snow on the edge they share, both draw the lower snow there, so no crack opens in the snow (a crack in the ground itself is the game's own and stays). No grass is put where the snow is deep enough to bury it, so no tips poke out of it. Only the look changes: walking, building and the shovel still use the game's own map. The ground itself is still built from 1 m squares. Each player decides for themselves.
• Build in deep snow. Every piece can be placed in deep snow, without shovelling first ("Too much snow" no longer stops you).
• Fires stay clear. A fire, brazier, torch or anything else that burns, placed in deep snow, clears the snow under it and a little around it, sloping back up over about a metre. Burning fires go on melting the snow around them slowly, as in the game. Floors and other pieces never clear the snow under them: shovel it where you want it gone.
• No wading on floors. The game measures deep snow from the ground, even under a floor, so a floor laid on 2 m of snow would make you wade across it. Standing on any building piece (solid snow and snow blocks too) now never slows you, and leaves no trail in the snow below.
• Wading. How much deep snow slows you is a setting (the game's own slowdown by default; deeper snow slows more).
• Snow pushed aside. When footsteps, a landing, a weapon swing, a creature or a falling tree takes deep snow away, that snow goes into a low bank just outside the spot instead of vanishing, so trails get snow walls beside them. A spot gains at most about 50 cm at a time and never more than the game can show; what doesn't fit goes a little further out. Fires still melt snow away, and the Snow Shovel still puts it in your inventory. Banks never go on paths, under or next to buildings, under roofs or near fires.
• Snow fills back in. While it snows in the Deep North, trails, shovelled spots and other dug-down places slowly fill back up to the depth untouched snow has there now: about one in-game day of snowfall from bare ground to full. A spot you just changed waits 10 minutes first, so the hole you are digging stays open. Never on paths or paved ground, under or next to building pieces, under roofs, near fires, on the ground the game's villages and ruins clear themselves, or right where someone stands.
• Snow on roofs. Building pieces in the Deep North that are open to the sky build up snow while it snows: a bare roof turns white after a few minutes of snowfall and is full after about 15, and keeps its snow in clear weather. Whether a piece is open is judged from points all across its top, so a roof half under an eave or a higher roof is judged by how much of it is open. Your existing builds turn white as soon as you come by; what you build later, and snow you shovel or walk off, comes back with the next snowfall. Pieces under a roof or a shield keep what they have, and pieces near a fire, a brazier or other heat keep none. Snow never damages a piece unless you turn that on.
• Snow. A new item: Snow, scooped up with the Snow Shovel from deep snow (1 a swing) and from snowy roofs (1 more). 100 to a stack, weight 0.2. It doesn't melt, in your pack or in chests.
• Solid snow: snow mountains, tunnels and caves. Holding the Snow Shovel, press H to switch it to snow shaping. Attack piles up solid snow where you aim, the way the hoe raises ground, and block digs it out, so you can build snow mountains, walls and houses and dig tunnels, caves and overhangs into them (no Hearth Below needed). J switches the brush between a ball, a square block (it stands on what you aim at, faces the way you look and lines up with the blocks next to it on a grid, so walls come out straight) and a round pile. Solid snow is real ground: you walk on it, build on it (pieces on it stand as on the ground) and it keeps the weather off like a roof. The secondary attack flattens the snow in the brush to the surface you aim at, so floors, walls and ceilings come out straight; U switches it to smoothing, which rounds off bumps, steps and edges. Adding costs Snow (1 a cubic metre), digging gives the same Snow back. Left Alt + mouse wheel sizes the brush; a faint see-through ball shows where it goes, the game's key hints at the bottom right show the shaping keys, and a small text by the crosshair what an action costs or why it can't be done. You aim at what is in front of you, never at the snow you stand in or a wall behind you. Only solid snow can be dug this way, never the ground. Snow piled up where you stand lifts you onto it; it never buries anyone else, rests against buildings instead of going into them, and lifts items lying in its way on top. The camera is kept out of solid snow, so you never look through a snow wall. It slowly melts near fires and other heat (a fire in a snow cave melts it wider, about 3 m an hour), and outside the Deep North and the Mountains (the same Cold biomes as snow blocks).
• Snow blocks. Six snow pieces on the hammer's Deep North tab for snow caves and igloos: Snow block (1 m), Half snow block, Snow wall (2 x 1 m), Snow floor (2 x 2 m), Snow slope (a 45 degree wedge) and Snow arch (2 m wide, for doorways). They cost Snow, take a few hits (100 health; the game's ice cube breaks in one), hold weight like the game's ice (overhangs and domes, also with mods that change ice's support), can be placed in deep snow and in any biome, and give all their Snow back when you take them down with the hammer. Like every piece, they show in the hammer once you have had their material, Snow, in your inventory.
• Snow blocks melt. Within the warmth of a burning fire, brazier, hearth, torch or anything else that warms you (about 8 m around a campfire, 13 m around a hearth, 3 m around a standing wood torch), a snow block melts away in about 10 minutes, in every biome; outside the Deep North and the Mountains it melts in about 30 minutes. The hammer's health bar shows how far it has gone, and repairing it packs it full again. A melted block leaves a little splash of water and nothing to pick up.
• snowday console command. snowday info shows the snow where you stand, how deep untouched snow would be there, and every setting with what SnowDay did this session. snowday look switches the smoothed snow edges on and off on the spot, for comparing. snowday roofs shows the roof snow near you and checks the piece you look at. snowday buildup shows how far the snow has built up. snowday refill, snowday blocks and snowday volume show what refilling, the snow blocks and the solid snow near you are doing.
• Diagnostic logs. Short lines in BepInEx/LogOutput.log say what each part did (snow set, pieces given snow, fires cleared, Snow collected, snow banked and refilled, solid snow added, dug and melted, snow blocks melting), a few of each kind and then at most one every 10 seconds, with a summary a minute.

How to use

Just play. In the Deep North:

1. Build where you like: pieces go straight into the snow.
2. Place a fire in the snow and it clears its own spot.
3. Equip the Snow Shovel and swing into deep snow or at a snowy roof: each swing moves the snow as in the game and puts Snow in your inventory (at your feet when it is full).
4. Press H with the Snow Shovel in hand for snow shaping: attack piles up solid snow, block digs it out, the secondary attack flattens it, Left Alt + wheel sizes the brush. J switches the brush shape (ball, square block, pile) and U switches the secondary attack between flattening and smoothing; the key hints at the bottom right show them all. Press H again (or put the shovel away) for the normal swing.
5. Open the hammer's Deep North tab for the snow blocks (they show once you have gathered some Snow). A fire inside an igloo melts its snow blocks in about 10 minutes; one in a solid snow cave melts the walls back about 3 m an hour.
6. Open the console (F5) and type snowday info to see the snow where you stand.

Command	What it does
snowday or snowday info	The snow, ground and biome where you stand, and every setting with this session's counts
snowday look	Smoothed snow edges on or off, until you quit
snowday look off / on	The game's own look / your settings' look (smoothed and softened)
snowday look soft / soft2 / soft3	4x finer and curved, with the deep snow's steps rounded off over 1 / 2 / 3 m
snowday look round	Rounded off over 2 m with no limit: rounder holes, but narrow trails drawn shallower. For comparing only
snowday look hires2 / hires4 / blur	2x finer / 4x finer (SnowDay 1.0.0) / 4x finer and softer
snowday look point / bilinear	The game's own map unfiltered / filtered: for testing how the game draws it
snowday look plain	The game's own map, with only the seams between pieces of ground closed
snowday look seams	Closing the seams between pieces of ground on or off, until you quit
snowday look setting	Back to the Smooth snow edges, Soften deep snow and Close snow seams settings
snowday roofs	Roof snow near you, and the piece under your crosshair checked on the spot: how much of its top sees the sky, its snow, and what the game's own roof check says
snowday refill	How the snow fills back in near you: the weather, the pieces of terrain around you and the spot under you
snowday buildup	How far the snow has built up, the season, the weather, and the roof and trees where you stand
snowday buildup <0-1>	Cheat (devcommands, on the host): sets how far the snow has built up, for trying it out
snowday blocks	The snow blocks: costs, how many are loaded, and how they melt where you stand
snowday blocks look <name>	Tries another look for the snow blocks (auto, ice or a game material), until you quit
snowday volume	The solid snow loaded near you: chunks, meshes, network and melting
snowday clearvolume <radius>	Cheat (devcommands): removes all solid snow within that many metres of you, without giving Snow

Configuration

Settings are in BepInEx/config/anwo.SnowDay.cfg and can be changed in game with a configuration manager. Server settings come from the host: every player needs the same snow.

1 - Deep snow

Setting	Default	Scope	Description
Deep snow	true	Server	Untouched Deep North snow starts at the game's own depth (about 1.1 to 1.4 m) and builds up while it snows, up to Snow height over Build-up time; not under roofs. Changed ground rises with it. Off: the game's own snow everywhere and nothing builds up (how far it had got is kept)
Snow height	2	Server	The most the snow builds up to on untouched ground at its deepest, in metres (0.1-2.1; 2.1 is the most the game can show). A change repaints the loaded terrain within a few seconds
Height variation	0.3	Server	How much shallower fully built-up snow is between drifts, in metres (0-1): with 2 and 0.3 the full snow is 1.7 to 2 m deep. 0: the same depth everywhere when full
Build-up time	30	Server	In-game days of snowfall in the Deep North for untouched snow to build up from the game's own depth to Snow height (0.5-120). Only snowfall counts: 30 days is 15 hours of snowfall, about 30 hours of play if it snows half the time
No build-up under roofs	true	Server	Snow doesn't build up on ground under a roof or a floor lying on the ground, and changed ground there above the game's own snow is lowered to it. Off: ground under roofs builds up like open ground, and changed ground there keeps its snow and rises with the build-up from then on (Refill still never fills trails under roofs)
Snow under roof edges	1	Server	With No build-up under roofs on: under a roof the snow stays the game's own; within this many metres of open sky it still builds up (0-5). 0: none under any roof
Build-up on trodden ground	true	Server	Trails, shovelled spots and banks rise with the build-up, never above the snow around them. Off: changed ground keeps its snow (Refill still fills trails back in)
Lower old snow from 1.0.0	true	Server	Once per 64 m piece of terrain, the game that looks after it lowers every changed spot whose snow 1.0.0 saved above what 1.1.0 draws there now (trails, banks and refills up to 2 m) down to it, also under roofs and in tree wells, and marks that piece done in the world's save. Spots below it are left for the build-up to fill; terrain first changed with 1.1.0 is never touched. Off: saved snow stays as 1.0.0 left it, standing above the new snow as ridges
Build-up in winter	2	Server	With Seasonality: how fast the snow builds up while it snows in winter, times Build-up time's speed (0-3). With the defaults (2, 1, 1, 0) a year of four equal seasons builds up as much as Build-up time says. Without Seasonality there are no seasons
Build-up in fall	1	Server	The same for fall (0-3)
Build-up in spring	1	Server	The same for spring (0-3)
Build-up in summer	0	Server	The same for summer (0-3): 0, nothing builds up
Summer melt time	0	Server	With Seasonality: in summer the built-up snow melts back towards the game's own depth, from full to none in this many in-game days of summer (0-365); trails and banks above the snow around them come down with it. 0: no melt, the build-up only waits
Tree wells	true	Server	Less snow round tree trunks (the game's choppable trees): lower within Tree well radius, down to Snow at tree trunks at the trunk. Off: the snow lies the same right up to trees
Tree well radius	2	Server	How far from a trunk the snow is lower, in metres (0.5-5); three quarters to one and a half times this by the tree's size
Snow at tree trunks %	50	Server	The snow right at a trunk, as a share of the game's own there (0-100): 0 bare, 100 the game's own (only the build-up stays away)
Wading slowdown %	100	Server	How much deep snow slows players and creatures, as a share of the game's own slowdown (0-150): 100 as the game does, 50 half, 0 never. See also Extra slowdown in deep snow %
Extra slowdown in deep snow %	25	Server	Deeper snow slows players and creatures a little more on top of the game's own: nothing up to 0.3 m, growing with the depth to this much at Snow height (0-75): about 5-10 % in 1.1 to 1.4 m, 15 % at 1.6 m, 25 % at 2 m. Never on building pieces or solid snow. 0: as before
Ridden mounts slow in deep snow	true	Server	A creature you ride wades like a player on foot (the game's player slowdown and the extra), also kinds the game never slows. Off: as before
Creatures leave trails	true	Server	Creatures walking in deep snow (ridden ones too) leave trails sized to them, pushed aside into banks; flying and tiny ones don't. At most 10 steps a second from all creatures on a game, and their terrain is saved together (Bank save interval). Off: as in the game
No wading on building pieces	true	Server	Standing on a floor or any other building piece never slows you and leaves no trail in the snow below. Off: as in the game, which measures the snow from the ground under the floor
Push snow aside	true	Server	Snow that footsteps, landings, swings, creatures or falling trees take away goes into a bank just outside the spot, so trails get snow walls beside them. Fires still melt it, and the Snow Shovel still collects it (with Collect snow off, its swings push snow aside too). Never on paths, under or next to buildings, under roofs, near fires or on the ground the game's villages and ruins clear themselves (as under 8 - Refill). Off: the snow just disappears, as in the game
Bank width	1.5	Server	How wide the bank of pushed-aside snow is, in metres (0.5-5). Wider: lower, smoother banks. Snow that doesn't fit (a spot gains at most about 50 cm at a time, 2.1 m at most) goes one bank width further out; what doesn't fit there either is lost
Push aside from	Walking, Landing, Attacks, Creatures, Other	Server	What pushes snow aside, separated by commas: Walking (players' footsteps), Landing (after a fall), Attacks (players' swings; the Snow Shovel only while Collect snow is off), Creatures, Other (falling trees and the like). All and None work too. Anything left out takes the snow away as in the game
Bank save interval	5	Server	Banks show at once on the game that looks after that piece of terrain; the others see them with its next save, which is the next footstep there or, at the latest, this many seconds after the first new bank (1-60). Each save makes nearby players rebuild that terrain, so it is saved at most once per this many seconds

2 - Houses

Setting	Default	Scope	Description
Build in deep snow	true	Server	Every piece can be placed in deep snow. Off: as in the game, most pieces need the snow shovelled away first
Clear snow under new fires	true	Server	A fire, brazier, torch or anything that burns, placed in deep snow, clears the snow under it. Only when it stands on or in the snow, not on a floor above it. Off: fires go into the snow as in the game
Fire clear margin	0.5	Server	How far beyond a new fire's edge the snow is cleared, in metres (0-3); it then slopes back up over about a metre
Fires melt snow	true	Server	Burning fires in the Deep North slowly melt the snow around them, as in the game. Off: they never do

3 - Roofs

Setting	Default	Scope	Description
Roof snow	Full	Server	Full: Deep North pieces open to the sky build up snow while it snows and keep it in clear weather; pieces near heat keep none. Vanilla: left to the game (with AzuWearNTearPatches' No Weather Damage on, the game puts snow on no piece). Off: no Deep North piece keeps any snow
Roof snow check	20	Server	How often each loaded Deep North piece is looked at, in seconds (5-300)
Roof fill time	0.5	Server	In-game days of snowfall for a bare roof to fill up (one day is 30 minutes of play): with 0.5 it turns white after about 4 minutes of snowfall and is full after 15. 0: full at once while it snows (0-10)
Open sky needed	50	Server	How much of a piece's top must see the sky for it to get snow, in percent (10-100)
Old roofs start white	true	Server	Pieces that have never had any snow (built before SnowDay) get full snow the first time they are seen, if open to the sky. Off: they build up with the weather like the rest
Snow load damage	false	Server	On: as in the game, weak pieces under full snow take damage over time. Off: snow never damages a piece (except with the world modifier for heavy snow on every piece). With AzuWearNTearPatches' No Weather Damage on, snow damages nothing either way
Roof snow look	100	Client	How thick snow on pieces is drawn, in percent of the game's own (100-200). Above 100 the game's snow shader is asked for more than its full level; try it and see. Only the look

4 - Shovel

Setting	Default	Scope	Description
Collect snow	true	Server	The Snow Shovel puts Snow in your inventory when it moves deep snow or roof snow. Off: it only moves snow, as in the game
Snow per swing	1	Server	Snow for each swing into deep snow, and as much again when a snowy roof is in reach (0-20)
Snow per strong swing	2	Server	Snow for a swing the game counts as a strong snow-shovel swing; the Snow Shovel's own isn't one (0-20)
Minimum depth	0.2	Server	Swings into snow shallower than this, in metres, give no Snow (0-2.1)
Snow from roofs	true	Server	Shovelling a building piece with snow on it gives Snow too
Shovel items	Shovel	Server	Item prefab names that collect Snow (and switch to snow shaping), separated by commas. Shovel is the game's Snow Shovel

5 - Solid snow

Setting	Default	Scope	Description
Snow shaping	true	Server	Holding the Snow Shovel, the mode key switches it to shaping solid snow: attack piles up snow where you aim as a ball, a square block or a pile (see Brush shapes), block digs the same shape out, the secondary attack flattens the snow in the brush to the surface you aim at (see Snow flattening) or smooths it (see Snow smoothing). The game's key hints at the bottom right show the keys. Adding costs Snow, digging gives it back. Only solid snow can be dug, never the ground. Off: the mode key does nothing; solid snow already made stays (and still melts)
Shaping mode key	H	Client	Switches the Snow Shovel between its normal swing and snow shaping. Leaving the mode, putting the shovel away or switching items brings the normal swing back
Brush size key	LeftAlt	Client	Hold it and turn the mouse wheel to make the brush bigger or smaller (the wheel alone still zooms the camera)
Brush radius	1.5	Client	The brush's radius in metres when you start (0.5-4); the wheel changes it in steps of 0.25 m, up to Largest brush radius
Largest brush radius	3	Server	The biggest brush anyone can use, in metres (0.5-4). A 3 m brush moves up to about 113 cubic metres at once
Snow per cubic metre	1	Server	Snow it costs to add one cubic metre of solid snow, and that you get back for digging one out (0-20). The same both ways, so no Snow is made or lost; flattening costs or gives Snow for what it fills in minus what it takes away. 0: free
Solid snow allowed in	Anywhere	Server	Where solid snow can be piled up: Anywhere, ColdBiomes (the Deep North and the Mountains) or DeepNorth. Outside the cold biomes it melts (see Melt in warm biomes). Digging works everywhere
Most snow chunks per area	512	Server	Solid snow is kept in 8 m cubes; this is the most one game area (64 x 64 m, all heights) may hold (8-4096). Adds that would need more are refused
Edits per second	5	Server	How often holding the add, dig, flatten or smooth button does it again, and the most edits a player can make a second (1-20)
Never bury characters	true	Server	Nobody gets stuck inside snow you add or flatten: another player or a creature more than 0.25 m inside the new snow makes it wait, and the small text by the crosshair names them. Snow piled up where you stand lifts you onto it (see Lift player onto new snow); if it can't, the add waits and the text says why. Off: snow is added anyway, and whoever is inside it may be stuck until it is dug out
Snow flattening	true	Server	While shaping, the secondary attack flattens the solid snow in the brush to the surface you aim at (see Flatten snap angle). Off: the secondary attack digs, as block does (as in 1.0.0)
Lift player onto new snow	true	Client	Snow you pile up or flatten where you stand lifts you onto it (up to 3 m, with room above you), instead of the add being refused. Off: such an add waits (with Never bury characters on) and the small text by the crosshair says it would bury you
Snow over pieces	false	Server	Off: an add is refused while a building piece is inside the brush; aimed at a piece, the ball rests against it. On: snow may also be piled over and into pieces
Lift buried items	true	Server	Items lying inside an add are lifted onto the new snow. Off: they stay inside it until it is dug out
Melt near fire	true	Server	Solid snow inside the warmth of a fire, brazier or other heat slowly melts away, so a fire in a snow cave melts the cave wider. Off: heat doesn't melt solid snow
Fire melt speed	0.05	Server	Metres a minute that solid snow melts back from each of its surfaces that the warmth of a burning fire or other heat reaches (about 8 m from a campfire, 13 m from a hearth) (0.01-5). 0.05: a 1 m wall near a fire melts from both sides and is gone in about 10 minutes, as a snow block is; the walls of a snow cave with a fire inside melt back about 3 m an hour
Melt in warm biomes	true	Server	Solid snow outside the cold biomes (Cold biomes under 7 - Melting, the same as for snow blocks: the Deep North and the Mountains unless changed there) slowly melts away. Off: it never melts there on its own
Warm melt speed	1	Server	Metres an hour that solid snow melts back outside the cold biomes (0.05-20): a 4 m snow mountain is gone in about four hours of play nearby; snow far from every player doesn't melt
Show brush	true	Client	While shaping, a faint see-through ball shows where and how big the brush is (reddish when adding there is refused)
Shaping hint	true	Client	While shaping, a small text by the crosshair shows the brush size, the Snow an add, dig or flatten costs or gives, and why one can't be done (with the key hints hidden, or on a gamepad, it lists the keys too)
Shaping key hints	true	Client	While shaping, the game's own key hints at the bottom right show the shaping actions instead, with your bound keys: pile up snow, dig, flatten or smooth, brush size, leave, and above them the shape and flatten or smooth keys. Off: the game's hints stay as they are and the small text by the crosshair lists the keys
Flatten snap angle	20	Client	When the surface you flatten to is within this many degrees of level (a floor, or a ceiling from below) or of upright (a wall), it is made exactly level or upright, so floors, walls and ceilings come out straight (0-45). 0: always the surface's own slope
Keep camera out of snow	true	Client	With your head right against a snow wall or ceiling the game's camera check can miss the snow and end up inside it, so you would see through it. On: a camera inside solid snow is moved towards your head until it is out. Off: the game's camera as it is
Brush shapes	true	Server	While shaping, the shape key switches the brush for piling up and digging between a ball, a square (an upright block that sits on what you aim at: on the ground, on top of or beside other snow) and a pile (a round heap, as much snow as the ball; dug, a round hollow). Off: always the ball
Snow smoothing	true	Server	While shaping, the flatten or smooth key switches the secondary attack between flattening and smoothing: smoothing rounds off bumps, steps and edges of the solid snow in the brush, keeping about as much snow as was there (what it adds or takes away costs or gives Snow as usual). Off: the secondary attack only flattens
Smooth strength	0.5	Client	How much one smoothing softens the snow in the middle of the brush (0.1-1): 1 all the way at once, 0.5 half way (hold the button to smooth more, at Edits per second)
Shape key	J	Client	While shaping, switches the brush shape: ball, square, pile (see Brush shapes). The key hints at the bottom right show the shape. J is free while you play (the game uses it only in the pause menu, to copy the join code)
Flatten or smooth key	U	Client	While shaping, switches what the secondary attack does: flatten or smooth (see Snow smoothing). U is free in the game, also in its debug mode, where Z, B, K and L are its own keys (fly, no build cost, kill all enemies, remove drops)
Square turn step	15	Client	The square brush stands upright and faces the way you look, turned in steps of this many degrees, so blocks made from about the same direction line up; aimed at the side of a block it faces that side instead (0-90). 0: exactly the way you look. 90: always along the world's north-south and east-west
Square grid	true	Client	The square brush snaps sideways to a grid as big as the block (in the direction it faces), so blocks set on, beside and next to each other line up edge to edge. Off: the block goes exactly where you aim
Solid snow look	auto	Client	How solid snow looks on your screen: auto (the game's packed snow, as on its snow lantern and the snow blocks; if that can't be used, SnowDay's own white snow), made (SnowDay's own white snow) or the name of one of the game's materials (used only if it draws solid, else auto). Always opaque and white; the log says which look was chosen

6 - Snow blocks

Setting	Default	Scope	Description
Snow blocks	true	Server	Adds six snow pieces to the hammer's Deep North tab. They cost Snow, hold weight like ice, can be placed in deep snow, give all their Snow back when taken down, and melt (see 7 - Melting). Off: they can't be built; snow blocks already built stay
Snow blocks need a workbench	false	Server	On: snow pieces can only be built near a workbench. Off: anywhere
Snow block health	100	Server	Health of every snow piece at full strength (1-10000; the game's ice cube has 10, so one hit broke a snow block). Melting still takes a full block away in its melt time, and repairing packs it full again. Applies to blocks already built too
Snow blocks keep ice support	true	Server	Snow pieces always hold weight with the game's own ice values (max support 1000, min 100), whatever other mods set for ice: AzuWearNTearPatches gives ice no support (with its Structural Integrity Control on or off), so snow blocks would float and pieces resting on them would break. Other pieces and the game's own ice blocks keep what other mods give them. Off: snow pieces get whatever the game and other mods give ice
Snow block cost	4	Server	Snow for one Snow block, 1 x 1 x 1 m (1-100)
Half block cost	2	Server	Snow for one Half snow block, 1 x 0.5 x 1 m (1-100)
Snow wall cost	4	Server	Snow for one Snow wall, 2 x 1 x 0.5 m (1-100)
Snow floor cost	4	Server	Snow for one Snow floor, 2 x 0.25 x 2 m (1-100)
Snow slope cost	2	Server	Snow for one Snow slope, a 1 m wedge (1-100)
Snow arch cost	6	Server	Snow for one Snow arch, 2 x 1.5 x 1 m (1-100)
Snow block look	auto	Client	How snow blocks look on your screen: auto (the game's packed snow from its snow lantern, else the snow on top of its ice cube), ice (the game's ice painted white) or the name of any game material (for example snow_flat, snow, snowlump). Try them with snowday blocks look <name>

7 - Melting

These are for snow blocks. Cold biomes is solid snow's too; its melt speeds are under 5 - Solid snow.

Setting	Default	Scope	Description
Snow blocks melt	true	Server	Snow blocks melt away near fires and other heat, and slowly outside the cold biomes. Melting wears a block's health down by the same amount every few seconds; repairing it with the hammer packs it full again. Snow in inventories and chests never melts. Off: snow blocks never melt
Melt time near heat	600	Server	Seconds for a full snow block to melt away within the warmth of a burning fire, brazier, hearth, torch or anything else that gives off heat, in every biome (0-3600). That warmth reaches about 8 m from a campfire or fire pit, 13 m from a hearth, 15 m from a bonfire, 5 to 8 m from a brazier, 6 m from a sconce and 3 m from a standing wood torch. 600: a fire inside an igloo takes it down in about 10 minutes. 0: heat never melts them
Melt time in warm places	30	Server	Minutes for a full snow block to melt away outside the cold biomes with no heat near it (0-1440). 0: they keep there too
Cold biomes	DeepNorth, Mountain	Server	Biomes where snow blocks and solid snow never melt on their own (only heat melts them there), separated by commas: Meadows, BlackForest, Swamp, Mountain, Plains, Mistlands, AshLands, DeepNorth, Ocean. The biome is the one the world was made with at that exact spot, so at a biome's edge both keep or melt alike
Melted blocks leave	Water	Server	Water: a melted block ends with a small splash of water. Nothing: it simply disappears. Either way there is nothing to pick up

8 - Refill

Setting	Default	Scope	Description
Refill	true	Server	While it snows in the Deep North, trails, shovelled spots and other dug-down places slowly fill back in, up to the depth untouched snow has there now (the game's own plus what has built up so far). Never on paths, under or next to building pieces, under roofs, on the ground the game's villages and ruins clear themselves, near fires, or right where someone stands. Off: trails never fill back in by themselves, as in the game (the build-up still raises them with the snow around them, see Build-up on trodden ground)
Refill time	1	Server	How long it has to snow for a spot dug to the bare ground to fill up again, in in-game days (0.1-10; one day is 30 minutes of play). Shallower dips fill sooner; only time while it snows in the Deep North counts
Refill delay	10	Server	Minutes a spot that was just shovelled, walked through or otherwise changed waits before snow comes back (0-120), so fresh trails and the hole you are digging stay open
Changes per minute	6	Server	The most refill changes each player's game makes a minute (1-30). One change covers a whole 64 m piece of terrain and makes nearby players rebuild it, so keep this low
Keep paths clear	true	Server	Hoe paths, paved roads and dug or dirt ground never get snow back (and no pushed-aside banks). Off: they fill in like any other spot
Building margin	2	Server	No snow comes back (and no banks go) under a building piece, solid snow included, or within this many metres of one (0-10). The build-up isn't held back by this, only by roofs (see Snow under roof edges). 0: only right under pieces
Fire margin	2	Server	No snow comes back (and no banks go) within this many metres beyond the area a fire melts or the warmth of anything hot reaches (0-10)

9 - Look and logs

Setting	Default	Scope	Description
Smooth snow edges	true	Client	Draws deep snow's edges from a smoothed copy of the snow map, four times finer, so they curve instead of stepping. Only the look
Soften deep snow	1	Client	With Smooth snow edges on: rounds off the deep snow's 1 m steps over this many metres, so snow walls beside trails and shovelled spots slope instead of standing in square blocks. Trail bottoms keep their depth (at most 10 cm more is drawn). 0: off (0-3). Only the look
Close snow seams	true	Client	Where two 64 m pieces of ground disagree about the snow on the edge they share, both are drawn with the lower snow there, so no crack opens along the edge. Works with or without Smooth snow edges. Only the look
Hide grass in snow deeper than	0.5	Client	No grass or other ground clutter is put where the Deep North snow is deeper than this, in metres (it would only be buried, with its tips poking out). Grass in trails, shovelled spots and thin snow stays. 0: off (0-2.1). Only the look
Diagnostic logs	true	Client	Short lines in LogOutput.log about what SnowDay did, limited so they never flood it. Off: only the startup line, the settings and warnings

Updating from 1.0.0

SnowDay 1.0.0 drew all untouched Deep North snow at 2 m at once; 1.1.0 starts it at the game's own depth and lets it build up while it snows. Old 1.0.0 trails and banks (and spots 1.0.0 refilled to 2 m) are lowered once to the new snow around them, a piece of terrain at a time as you come by, so they don't stand up as ridges (Lower old snow from 1.0.0). Snow inside houses goes back to the game's own. Your Snow, solid snow and snow blocks stay as they are. The shaping key that switches flatten and smooth is now U. Everyone needs 1.1.0 to play together.

Multiplayer

• Everyone needs SnowDay, the host or dedicated server included. Jotunn refuses a player without it, and the first two parts of the version must match (any 1.1.x with any 1.1.x): everyone needs this version to play together.
• The host sets the rules. Every Server setting comes from the host, so everyone sees and wades through the same snow. A change made in game rebuilds the loaded terrain on every player's game within a few seconds. The shaping keys, brush, hints, lifting, flatten snap, smooth strength, square turn and grid, camera, the looks (snow edges, seams, grass, roof snow look) and the logs are each player's own.
• Snow build-up. The host's game counts the Deep North's snowfall, saves how far the snow has built up with the world and sends it to everyone (also to players who join); each game draws its own terrain from it. Ground under roofs is worked out by each game from the pieces it has loaded, so everyone gets the same.
• Old snow from 1.0.0 is lowered once by the game that runs each piece of terrain, and the piece's own saved data says it is done, so it is never lowered again, by anyone.
• Who does what. Each game draws the snow height itself, from the host's settings. A fire's clearing, a bank of pushed-aside snow and refilling go to the game that runs that piece of terrain (usually the nearest player's), as a shovel stroke does, and are saved there; the others see them with its next save. Roof snow is set by the game that runs each piece and shown to everyone. Snow goes to whoever swings the shovel.
• Solid snow. Each 8 m cube of solid snow is saved by one player's game; everyone else's adds and digs show on their own screen at once and are sent to it. The same game melts it.
• Snow blocks are melted by the game that runs each block, and everyone sees its health go down.

Compatibility

• AzuWearNTearPatches. Its No Weather Damage makes the game count every piece as roofed, so the game itself never puts snow on roofs (and never applies snow damage). SnowDay's roof snow looks for open sky itself, which that setting doesn't change, so roofs get snow with it on. The log says what it found at start. It gives materials it has no setting for, the game's ice among them, no support values at all, with its Structural Integrity Control on or off (only Disable Structural Integrity system together with Control on gives them full support): ice blocks never fall, even in mid-air, and other pieces resting only on them get no support and fall. Snow blocks keep the game's own ice support anyway (Snow blocks keep ice support, on by default), so igloos stand and hold what you build on them; the game's own ice blocks and every other piece keep what Azu's settings give them. The log and snowday blocks show the support snow blocks really get and what other mods give ice.
• RustyMods Seasonality. Its weather decides when it snows, for roof snow and the build-up alike, and its season how fast the snow builds up (Build-up in winter and the rest) and, with Summer melt time set, when it melts back. The log's 'Build-up: the Deep North's weather' line says how often it snows in your game.
• PackBeasts. A creature you ride wades in deep snow like you (Ridden mounts slow in deep snow); PackBeasts' riding speed and SnowDay's slowdown work together.
• Hearth Below. Works alongside it; nothing in this version depends on it. Solid snow is SnowDay's own: snow caves don't need Hearth Below.
• Building mods (Infinity Hammer, Gizmo, PlantEasily, ZenRedecorate and others) keep working: SnowDay only lets the piece being placed into deep snow and looks at what was placed afterwards. Snow blocks are ordinary hammer pieces.
• The H, J and U keys do something for SnowDay only while you hold the Snow Shovel (J and U only while shaping); with anything else in hand they do nothing for SnowDay, so other mods' uses of them keep working. None of them is one of the game's own keys, in play or in its debug mode (devcommands); if you set a shaping key to one of the debug keys (Z, B, K, L), the log says so.
• Pieces placed by other mods that bypass the game's own placing don't clear snow under fires.

Patches: WorldGenerator.GetDeepNorthHeight and HeightmapBuilder.Build (untouched snow height and its build-up), ZNet.Awake (the build-up's network messages), Piece.Awake and Piece.OnDestroy (where the ground is under a roof), Heightmap.Regenerate and Heightmap.OnDestroy (the smoothed snow map and closed seams), ClutterSystem.GetGroundInfo (no grass under deep snow), Character.UpdateWalking and Character.UpdateGroundContact (wading and trails on building pieces, and who pushed snow aside), Player.UpdatePlacementGhost (build in deep snow), Player.PlacePiece (fires clear snow), Fireplace.UpdateSnowMelt (fires melt snow), WearNTear.Awake, WearNTear.OnPlaced, WearNTear.OnDestroy and WearNTear.UpdateSnowVisual (roof snow, its look and snow load damage), Attack.DoMeleeAttack (Snow from the shovel, and swings that push snow aside), TerrainOp.Awake, TerrainOp.Settings.Deserialize, TerrainComp.DoOperation and TerrainComp.Save (snow pushed aside, creatures' trails saved together, and when refilling may start), TerrainComp.Awake (terrain first changed with 1.1.0 is marked as having no old 1.0.0 snow), WearNTear.GetMaterialProperties (snow blocks keep ice support, snow pieces only), Player.SetControls (the shovel's buttons while shaping), GameCamera.UpdateCamera (the wheel sizing the brush, and the camera kept out of solid snow), Hud.UpdateCrosshair (the shaping hint) and KeyHints.UpdateHints (the shaping keys in the key hints).

Uninstalling

Untouched snow is the game's own again at once. The world keeps how far the snow has built up in one object of SnowDay's own at the world's centre; the host's game deletes it when that spot loads without the mod, and putting SnowDay back then starts the build-up again from the game's own snow. Trails, shovelled spots, snow melted or cleared under a fire, banks and refilled, built-up or lowered spots keep the snow they have, since the game keeps that itself (with a small mark on each piece of terrain that its 1.0.0 snow was lowered, which the game ignores), and Deep North roofs stay white until their snow is shovelled or walked off. Snow in inventories and chests is gone when they next load. The host's game deletes every object whose prefab it no longer knows when it next loads it, so solid snow, snow blocks and Snow lying on the ground are gone for good, and putting SnowDay back doesn't bring them back. Building pieces standing on solid snow lose their footing, and those resting on snow blocks their support, so they may fall. Nothing else in the world is changed.

About

Made with Claude (Anthropic's AI model) and tagged AI Generated, as Thunderstore's rules ask. Built for Valheim 1.0.17 (Deep North) with BepInEx 5.4.2351 and Jotunn 2.30.2.

Found a bug or a clash with another mod, or have an idea? Tell us on GitHub. For a bug, attach your BepInEx/LogOutput.log from the game where it happened.