FUNKIN' IS FUEL

Friday Night Funkin' rap battles inside ULTRAKILL.

Every level hands you a mic. Throw it at an enemy and the level freezes into an FNF rap battle against that enemy. The song is random each time, picked from your own Friday Night Funkin' install and every mod in it. Win the song and the enemy dies. Run out of health and it's game over.

You need Friday Night Funkin'

This mod uses your own copy of Friday Night Funkin' (V-Slice), the free download from itch.io or Newgrounds. It reads the songs, charts, note art, sounds and Boyfriend from that copy, along with any FNF mods you've installed there. Nothing from FNF is included in this package.

The mod looks for Funkin.exe in your Downloads, Desktop, Documents, Program Files, Games folders and the itch app. If it can't find it, press N in a level and paste your FNF folder into the mic menu.

Controls

Key	What it does
M	Throw the mic. Hit an enemy to start a rap battle; if it misses, it comes back.
A S W D or arrow keys	The four arrows
Punch (your bind, or your own parry key)	Parry a blue attack
Dash (your bind, or your own dodge key)	Dodge an attack, blue or yellow
N	Mic menu
F8	Pose maker

You can rebind every key, parry and dodge included, in the mic menu (N) or in Options > Plugin Config > FUNKIN' IS FUEL.

Features

• Battles: real FNF charts from the base game and your mods, at any difficulty. Holds, splashes, ratings, combos, the countdown, health and score all work like FNF. Tricky's hell notes and similar "don't hit" notes hurt you.
• Chart events play in 3D: FocusCamera, ZoomCamera, camera bops, scroll speed changes and animations drive a side-on stage camera. Mod events become screen effects (flashes, shakes, lights, lyrics, strum tricks, health drain). Songs without camera moves get them, and a remix adds extra effects to every song.
• Attacks mid-song: the enemy flashes blue (parry it back for health) or yellow (dodge it). Songs' own dodge mechanics, such as QT's sawblades, turn into attacks too.
• Bosses are more intense: boss battles use the busiest songs on their hardest difficulty, scroll faster and drain health. Bosses attack far more often, chain combos, hit harder, and the stage has a red pulse with the camera hitting every beat. A slider scales all of this.
• Who raps for you: V1 holding the mic, Boyfriend (the FNF sprite), or both.
• Poses: the enemy, V1 and Boyfriend strike a pose for every arrow, flinch on misses and dance on the beat. Every other enemy around dances while you rap.
• Pose maker (F8): make your own animations for V1, the enemy you're aiming at, or any enemy type in the game (choose from a list). There's a slot for each direction, each miss, idle, hey, attack and hurt.
  • Click a bone and drag on the model to rotate it. Shift-drag twists it, Ctrl-drag moves it.
  • Quick-pick buttons select common body parts.
  • Move and turn the whole body with no limits, or type exact values.
  • Animations can have keyframes and can start from the character's own animations.
  • Put poses and animations you already have into the one you're making: from your saved animations (any character), the battle's automatic poses or the game's own animations. Add them as keyframes, replace with them, or layer them on.
  • Copy or move an animation to another slot or another character. It's converted to fit their skeleton.
  • V1's mic has bones too (grip, neck and head) to bend and move.
  • Mirror left and right, and undo or redo with Ctrl+Z / Ctrl+Y.
  • Battles use what you make.
• Multiplayer: works with any multiplayer mod that uses a Steam lobby (BLOODLINK, Polarite, Jaket...). When someone throws their mic, everyone in the level who has FUNKIN' IS FUEL watches the rap battle in real time. They see the same stage, song, notes, attacks, poses and score, and the whole level stops until it's over. Watchers hear the song if they have it in their own FNF; otherwise they watch it without music.
• Mic menu (N): the level freezes while it's open. You can:
  • queue the next song (with search),
  • choose the difficulty and who raps for you,
  • choose where Sick/Good pop up,
  • set downscroll, middlescroll, attacks, boss intensity, scroll speed, volume and audio offset,
  • see who in your multiplayer game has the mod, and turn sharing on or off.

Notes

• Losing a rap battle deals 100 damage by default, like an FNF game over. You can lower it in the settings.
• Multiplayer needs everyone to have the same version of FUNKIN' IS FUEL. A multiplayer mod without a Steam lobby can still work: turn on "Also with Steam friends in the same level" in the mic menu.
• Your custom poses are saved in BepInEx\config\RapBattle\Poses.
• To use a different mic model, plugins\tools\convert_mic.py (a Blender script) turns an FBX, OBJ or GLB into the mic files in plugins\mic.

Credits

Friday Night Funkin' is by The Funkin' Crew. ULTRAKILL is by Arsi "Hakita" Patala and New Blood. This is a fan mod made by a fan of both.