The one-week Environment #2 Finished!

[JonnyAnomaly]

I'm not sure what a detail map is, but since HPL2 can't do texture blending and things, I think the only way to get varied textures and details throughout a terrain is to make a basic terrain with a tiling sand texture, and then make a large sand dunes mesh which you can use a new texture with different details on, but paint the texture so it blends into the terrain texture near the bottom. Then you can position them together in the 3D app so they don't all appear made from one mesh. I guess the smaller/more linear the map, the easier it is to hide these seams from the player. The dunes further away can just be part of a skybox.

I think this idea can be done nicely, but will always be much easier on a smaller scale with more linear travel through the map, as opposed to a wide open world.