hasanyalmanbas / BakeShader

Unity editor tool for baking shaders to textures. Blit2D, Blit3D, or MeshRenderer (uses model UV). Adds options to Material & MeshRenderer context menus and Editor Window (under Window/Cyanilux/BakeShader)

BakeShader

• Adds "Bake Shader" window (under Window/Cyanilux/BakeShader)
  • Includes modes : Blit2D (png), Blit3D (Texture3D asset), MeshRenderer
• Also adds "Bake" options to the "..." context menus on Material asset and MeshRenderer component
  • (If BakeShader window is open, this will use resolution & path settings set there, otherwise uses defaults)
• Should work in any render pipeline!

Setup:

• Install via Package Manager → Add package via git URL :
  • https://github.com/Cyanilux/BakeShader.git
• Alternatively, download and put the folder in your Assets

Notes :

• Blit2D : Shader is blit (basically draws a quad) to a Texture2D
  • Result saved as .png
• Blit3D : Shader is blit to a Texture3D in slices
  • Use "_SliceDepth" Float property in shader. This ranges from 0 to 1 through the depth of the Texture3D
  • Result saved as Texture3D asset
• MeshRenderer : Renderer is drawn to Texture2D
  • Will bake using first Material only
  • Scene View must be open for Renderer baking to occur
  • For correct results, shader should be unlit and output using UV coordinates instead of vertices :
    • For graphs, use the provided Bake Shader Vertex Pos subgraph in the Position port on the Vertex stack
      • Note that using the Position node in Fragment stage will now produce different results, as this changes the vertex positions. In v12+ we can avoid this by using a Custom Interpolator to pass the unmodified vertex pos through, if required. See : https://www.cyanilux.com/tutorials/intro-to-shader-graph/#custom-interpolators
    • For cg/hlsl, this should work (though some variables may need renaming) :

#pragma multi_compile _ _BAKESHADER

// in vertex function :
#ifdef _BAKESHADER
    float2 remappedUV = IN.uv.xy * 2 - 1;
    float3 bakeShaderPos = float3(remappedUV.x, remappedUV.y, 0);
#else
    float3 bakeShaderPos = IN.vertex;
#endif

OUT.vertex = UnityObjectToClipPos(bakeShaderPos); // Built-in RP
OUT.positionCS = TransformObjectToHClip(bakeShaderPos); // URP