VRChat

Collection of useful vrchat items :

• shaders (most of this git currently)
• scripts
• prefabs (maybe later)

Link database (Unity, Blender, high-level)

Official docs https://docs.vrchat.com/ + link to current Unity version

Prefabs and tools

• List of many prefabs : https://vrcprefabs.com/
• VRLabs prefabs https://github.com/VRLabs

Tools

Avatar

• Avatar optimizer (low configuration needed) https://github.com/d4rkc0d3r/d4rkAvatarOptimizer
• AnimatorAsCode : animator/animation generator from a CSharp description https://github.com/hai-vr/av3-animator-as-code
• Face tracking blendtree generator https://github.com/rrazgriz/VRCFTGenerator/blob/main/VRCFTGenerator.cs
• Guided merge of prefabs : https://modular-avatar.nadena.dev/ https://github.com/bdunderscore/modular-avatar
• Tools to trim polygons in unity (NDMF compatible) : https://github.com/anatawa12/AvatarOptimizer https://vpm.anatawa12.com/avatar-optimizer/en/

Texturing

• generate PBR from photos http://www.boundingboxsoftware.com/materialize/index.php

Shader frameworks

• Orels modular shader (code based) : https://shaders.orels.sh/
• Poiyomi modular shader (Gui-based, user friendly) : https://www.poiyomi.com/
  • module examples : https://github.com/triazo/Poiyomi-Modules
  • module system : https://github.com/VRLabs/Modular-Shader-System

Avatar from scratch

• Text source with lots of details for bone naming, tool usage : https://ask.vrchat.com/t/guide-newbie-friendly-guide-for-making-a-custom-avatar-from-scratch/3633
• Blender for vrchat avatar https://www.youtube.com/c/RainhetChaneru/videos
• mesh import plugins https://github.com/johnzero7/XNALaraMesh

VRChat/Unity

• Blendtree example https://www.youtube.com/watch?v=EkVlkrQ6ypE
• Collider layers : http://vrchat.wikidot.com/worlds:layers
• Physbones : https://www.youtube.com/watch?v=PTTnWUkswkU
• Projectors (map only) :
  • https://docs.unity3d.com/Manual/visual-effects-decals.html
  • https://en.wikibooks.org/wiki/Cg_Programming/Unity/Projectors
  • https://forum.unity.com/threads/where-to-get-the-shaders-for-projector-component.1375395/
  • Alternate depth overlaying : https://www.ronja-tutorials.com/post/054-unlit-dynamic-decals/
• World lighting setup https://gitlab.com/s-ilent/SCSS/-/wikis/home
• Colliders in worlds https://www.polygonalmind.com/blog/optimizing-vrchat-worlds-collision-debugging

Tool devs and link dbs

• Hai https://hai-vr.notion.site/hai-vr/Knowledge-Index-f53af3099f414e2080b1c0a7425b54e5
• https://vrclibrary.com/wiki/
• awesome vrchat (large link db) : https://github.com/madjin/awesome-vrchat
• Silent : tools, shaders : https://github.com/s-ilent
• HFCred (benchmarks, directblendtree) https://notes.sleightly.dev/
• PiMaker : RiscV emulator https://blog.pimaker.at/texts/rvc1/ ; https://github.com/pimaker
• SCRN : ML models as shaders https://github.com/scrn-vrc
• pema99 shader tricks : https://github.com/pema99/shader-knowledge (very interesting part on instancing !)

Shaders

Shader basics

• MVP transforms https://jsantell.com/model-view-projection/
• Transforms again https://en.wikibooks.org/wiki/Cg_Programming/Vertex_Transformations
• Normal transforms : https://forum.unity.com/threads/difference-between-unityobjecttoworlddir-and-unityobjecttoworldnormal.435302/
• Shader tips : https://github.com/cnlohr/shadertrixx
• Nvidia GPU gems books : https://developer.nvidia.com/gpugems/gpugems/
• Catlike coding tutorials : https://catlikecoding.com/unity/tutorials/

Unity shader fondamentals and integration

• https://docs.unity3d.com/Manual/SL-VertexFragmentShaderExamples.html
• https://www.alanzucconi.com/2015/07/01/vertex-and-fragment-shaders-in-unity3d/
• semantics https://docs.unity3d.com/2019.4/Documentation/Manual/SL-ShaderSemantics.html
• material properties https://docs.unity3d.com/ScriptReference/MaterialPropertyDrawer.html https://docs.unity3d.com/Manual/SL-PropertiesInPrograms.html

Examples

• https://github.com/netri/Neitri-Unity-Shaders#types
• Ocean : https://www.youtube.com/watch?v=yPfagLeUa7k

VRChat specific

• Audiolink : https://github.com/llealloo/vrc-udon-audio-link/tree/master/Docs
• LTCGI from pimaker : https://ltcgi.dev/ https://github.com/PiMaker/ltcgi/
• ProTV api : https://protv.dev/api/shaders-avatars

Shadowcasters

• https://forum.unity.com/threads/custom-shadow-caster-and-collector-pass.1141900/

Shading/Lighting

• Blender baking example for bevel and AO maps : https://www.youtube.com/watch?v=-VrYME9-_xU
• Normal work http://www.aversionofreality.com/blog/2022/4/21/custom-normals-workflow
• Parallax mapping for faking geometry : https://learnopengl.com/Advanced-Lighting/Parallax-Mapping https://mrrolord.gumroad.com/l/BlenderPOM

Depth (in unity)

• https://www.cyanilux.com/tutorials/depth/

Raymarching

• Sphere impostor https://bgolus.medium.com/rendering-a-sphere-on-a-quad-13c92025570c
• https://jamie-wong.com/2016/07/15/ray-marching-signed-distance-functions/
• https://www.youtube.com/@InigoQuilez/videos

Geometry shader

• Examples https://github.com/keijiro/StandardGeometryShader/blob/master/Assets/StandardGeometry.cginc
• Performance insights http://www.joshbarczak.com/blog/?p=667

Signed Distance Function (SDF) textures for sharp bitmaps

• Initial article by Valve https://steamcdn-a.akamaihd.net/apps/valve/2007/SIGGRAPH2007_AlphaTestedMagnification.pdf
• Multi channel example https://www.shadertoy.com/view/NtdyWj
• Multi channel tool and pdf doc : https://github.com/Chlumsky/msdfgen/
• Vrc/unity integration : https://github.com/MerlinVR/Unity-MSDF-Fonts

Tessellation