Unity Terrain second controll map property name

Questions & Answers
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1

I’m using Shader-Graph to make a triplanar shader for my Terrain.

I have managed to access most of properties through references but i cant find what is the name of second control texture. First one is _Control and works perfectly. But following naming standard of other properties with _Control1 sadly got me nothing.

Anyone knows reference name of second control?

3

Hey, I realize this is an old topic, but to anyone who finds this on Google like me, the textures in Unity-2023-2 URP 16.x are in fact named:

_Control0, _Control1, _Control2, _Control3, _Splat0, _Splat1, …, _Splat14, _Splat15

In my case, I found that I needed to add the tags:

Tags
{
    ...
    "TerrainCompatible" = "true"
    "SplatCount" = "16"
}

Once I added these tags, my shader was able to support more than 4 layers. Before you add these tags, the textures will just be blank as Unity is not filling the texture data.

2

All terrain control textures are passed through the same property one at a time - as such, they are all named _Control.

This is because of how Unity handles terrain drawing with more than 4 texture sets; it re-renders the terrain every 4 textures with a new control map and combines it with the previous passes. If you want more than one control map in the same shader, you’ll have to access it through a script and pass it to the material manually.