createsim
Textures and models come from your own game files. Drop these two jars here (once, they're remembered in this browser):
- Minecraft 1.21.1 client jar
.minecraft/versions/1.21.1/1.21.1.jar
- Create 6.0.10 for 1.21.1
create-1.21.1-6.0.10.jar from your mods folder
The files never leave your computer.