Support for decals/paths? about godot_heightmap_plugin HOT 1 OPEN

That would be nice to have, but I have no time dedicated to work on this currently.

I wonder if I could ask if you had any advice about how best to implement this sort of behaviour.

I also don't know how it would actually be rendered. Only road systems I know still use meshes or at least some kind of extra drawing, and are a bit complicated, especially when having to cobble it up with GDScript.

My initial thoughts were to add the road texture as one of the TextureArray layers, and then blend it using a splatmap

That wouldn't work at all because that doesn't contain direction information and will lack precision, it would end up the same as yet another paintable ground texture, which is not going to give you the result you want.

I also wondered about the Godot decal plugin

No need for plugins, Godot already has a Decal node built-in. But for roads I'm still not sure how it would work. If your goal is to not create any geometry, you could eventually work out a solution without even touching the terrain plugin, by placing "road tiles" using decal nodes? But if you want full spline support with any number of bends and intersections then that's an order of magnitude more complex to implement.

from godot_heightmap_plugin.