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I'm at a loss for words. What I will say is I think you are charging far too little for what you're offering here. Holy crap.

I can work around it, but it seems to only be applying grass onto the first submesh of the mesh, is that intended?

This looks absolutely stunning. Can't wait to try it out! Noticed it mentions it requires light volumes to look correct for worlds with otherwise baked lighting? Can this be quite a low resolution bake when working in a large world for performance and still work well? :>

Thanks! It can be any resolution you want and feel enough. For example, I use 1x1x1 Light Volume (a single voxel) for the demo world here :D Because there are no sharp shadows from any objects, so it works nice. Light Volumes here are not something that should limit you.

To add, the beauty of light volumes is that they can work like light probes. You can use a very low density volume for outdoors, and then override with a more dense version indoors. I also saw for the first time someone suggest not even baking lights and just using light volumes, which I will try.

How does the surface mesh stuff work? I really wanna pick this up because I do a lot of source ports and low brush / grass that looks natural has been kind of out of my reach for a while, but I don't wanna get it only to find out I can't brush it onto the type of terrain I usually work with

How the asset works: Mesh generation and painting: - Editor script generates a copy of a specified surface mesh or terrain to leave original untouched - User paints grass mask that is stored as RGB vertex color of the surface mesh shape to have the correct sorting, reducing overdrawing.

Surface mask pass: - A dedicated orthographic camera renders the assigned surface meshes with MaskMaterial into a render texture. - Mask RGB comes from vertex color and defines grass type distribution. - Mask A stores world-height information used to place particles vertically.