Nunya's Tumbys

This mod adds variants of the default poon, chang, and byrdle textures with bellybuttons, copied from the kubold texture and then recoloured. Imps already have belly buttons, though they're done differently from kubolds so it isn't totally consistent.

I've also added variations with stretchmarks as well, with skins done for poons, imps, byrdles, kubolds, and imps. Small note too, the byrdle skins are quite different to work with than anything else so far, so they may look a little odd. Unfortunately though byrdle is hard to work with in general, so I'm not sure what else can be done to improve them. But if you have any suggestions, please do contact me through one of the sites below!

This mod is now essentially feature complete for what I plan to add, but I do intend on supporting it if there are any bugs found, or if I decide to touch up the textures at any point. I'm also open to suggestions for new skins, as long as they fit the overall theme of realistic alternate belly types! Hypothetically something like piercings fit the theme and could be added in the future, but I don't specifically plan on it. Feel free to contact me below with any feedback, or just to tell me if you like the mod!

I've tested this to work at least on game versions as new as 12026.a3 with HB version 4.7.3. If an update to either the game or HB breaks this mod in the future, please let me one of the ways below.

If you like this, you MAY also be interested in my NSFW mod Nunya's Num Nums (NSFW). It contains a variety of NSFW items and outfits related to weight gain and feedism.

You can reach me at the unofficial Atlyss Modding Central Discord server, or at my Bluesky account (NSFW): @nunya--business.bsky.social

Changelog (DD/MM/YYYY)

2.4.0 - 16/03/2026

• Added stretchmark variations for imps.

2.3.0 - 09/03/2026

• Reformat changelog and readme.
• Added stretchmark variations for kubolds. May need to touch these up later, and still need to add them for imps.

2.2.0 – 04/03/2026

• Added stretchmark variations for changs and byrdles. The rest of the remaining species are still planned for later.

2.1.0 – 02/03/2026

• Added stretchmark variations for poons. The rest of the species are planned for later.
• Update mod icon to show stretchmarks.

2.0.2 – 15/01/2026

• Update HB dependency to 4.7.3, and add notes about supported versions to the README.
• Add link to the unofficial Atlyss Modding Central Discord server in README.

2.0.1 – 10/11/2025

• Fixed changelog for 2.0.0 (I never actually uploaded 1.1.0…)
• Changed the readme to mention wanting stretchmarks to be added in the future.
• No in-game changes were made (hopefully).

2.0.0 - 16/05/2025

• Added bellybuttons for changs and byrdles.

1.0.0 - 15/05/2025

Release

• Added bellybuttons for poons.