There is, indeed, an official Abyss Discord server you can follow by clicking the link. When you become a member, you'll need ...
ClientSettings that will remove most textures & uncap your framerate - Magmurrr/roblox-remove-textures ...
The Roblox default textures, but made as Unity materials for URP. These are just the original textures extracted from the Roblox's files, no idea if they have copyright ¯\ (ツ)/¯ Note: All the textures ...