Cyanilux / BakeShader

Unity editor tool for baking shaders to textures. Texture2D, Texture3D, Flipbook, or MeshRenderer (uses model UV)

BakeShader

• Adds "Bake Shader" window (under Window/Cyanilux/BakeShader)
  • Includes modes : Texture2D (png), Texture3D asset, Flipbook, 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 mentioned below)
• Should work in any render pipeline!
• By default, results are saved under Assets/BakedTextures

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

Bake Modes :

• Texture2D (png)
  • Shader is blit (basically draws a quad)
  • Result saved as .png
  • Defaults to 2048x2048 size
• Texture3D
  • Shader is blit in slices. Use _Slice Float property in shader calculations. This ranges from 0 to 1 through the depth of the Texture3D
  • Result saved as Texture3D asset
  • Defaults to 128x128x128 size
• Flipbook
  • Same as Texture3D, but slices are combined vertically into a long Texture2D
  • Result saved as .png, this could then be imported as a regular texture (for usage with Flipbook node later) or as a 2D Array, or 3D Texture.
  • Defaults to 256x256 size (per slice), 32 slices, (so final image size of 256x8192)
• MeshRenderer : Renderer is drawn to Texture2D
  • Will bake using first Material only. Scene View must be open for Renderer baking to occur
  • Defaults to 2048x2048 size
  • For the intended result, shader should be unlit and output using UV coordinates instead of vertices :
    • For Shader Graphs, use the provided Bake Shader Vertex Pos subgraph in the Position port on the Vertex stack. Also use Render Face : Both in graph settings.
    • 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 Shader Code (CG/HLSL), the following should work (though some variables may need renaming). The pass should also specify Cull Off

#pragma multi_compile _ _BAKESHADER

// in vertex function :
#ifdef _BAKESHADER
    float2 remappedUV = IN.uv.xy * 2 - 1;
    float4 outputPos = float4(remappedUV.x, remappedUV.y, 0, 1);
    OUT.vertex = outputPos; // Built-in RP
    OUT.positionCS = outputPos; // URP
#else
    OUT.vertex = UnityObjectToClipPos(IN.vertex); // Built-in RP
    OUT.positionCS = TransformObjectToHClip(IN.vertex); // URP
#endif
// (where "vertex" / "positionCS" is the common naming convention for the parameter using SV_POSITION semantic)