How expand the terrain palette of textures

How to programmatically expand the terrain palette of textures ? I do not need a shader. I just want to add texture to the palette. Best regards
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I realize it’s nearly 10 months later, but hopefully this can help future people if not you.

You want to add a new SplatPrototype to Terrain.terrainData.splatPrototypes. Every SplatPrototype instance has a variable texture which takes a Texture2D.

I haven’t actually tried this myself yet (so I don’t have any sample code to share doing this) but while looking into a similar thing (just printing out the list of textures used on a terrain) I found this info.