HDRP Shadergraph Custom Terrain Shader layers

Unity Engine
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1

Hi All,

I am trying to create a custom terrain shader in the shadergraph (12.0.0) for the Unity standard terrain using various resources I found online but have hit a bit of a brick wall. I can get the first four textures of the Unity Terrain by using Reference “_Control0” in a sample texture 2d and split the output but am struggling trying to get the 5th, 6th, 7th and 8th texture.
After looking in the “TerrainLit_Splatmap.hlsl”, I thought it would simply be using the Reference “_Control1” with my logic being that as stated in the above:

#ifdef _TERRAIN_8_LAYERS
    DECLARE_TERRAIN_LAYER_TEXS(4);
    DECLARE_TERRAIN_LAYER_TEXS(5);
    DECLARE_TERRAIN_LAYER_TEXS(6);
    DECLARE_TERRAIN_LAYER_TEXS(7);
    TEXTURE2D(_Control1);
#endif

I have tried adding _TERRAIN_8_LAYERS to the scripting define symbols but this made no difference.

Any pointers gladly received and thanks in advance.

2

I have the same issue. I cannot access the 4 last layers. Did you find out how to do it?

3

Cross-posting from another thread:

For those wondering, I couldn’t access _Control1 until the tag “SplatCount = 8” was added to my shader (inside Shader > SubShader > Tags). If you want to add that to your shader graph shader, you’ll need to modify the generated source.