I noticed with MicroSplat so some more errors. A: When I select the setup " Apply Type: Texture InShader->UseCustomSplatmaps: True " it causes the terrain to blend the textures completely wrong, they are all overlaid very randomly and make more of a uniform mush. It doesn't matter if the terrain is instanced or not.
B: If I choose the setup " Apply Type: Splats InShader->UseCustomSplatmaps: False " it causes the terrain to behave rather correctly from the blending point of view, but the whole thing doesn't react at all to the set textures in the MicroSplat node. completely wrong textures are displayed. Also here it doesn't matter if instanced or not.
C: If I choose the setup " Apply Type: Both InShader->UseCustomSplatmaps: False " Leads to the same behavior as B
D: If I select the setup " Apply Type: Both InShader->UseCustomSplatmaps: True " Leads to the fact that only one texture is displayed.
In short: No single option to apply MicroSplat to the terrain currently works. MicroSplat on non-MapMagic terrain behaves normally (both instanced and non-instanced).
Unity 2020.2.3f1 URP | MapMagic 2.1.1 | MicroSplat 3.731