Hey don't worry...
I think you can take you heightmaps and make meshes from them, then overlay them on top of your terrains!
You would therefore still be able to use the original code to trace which surface is under which part of the course!
The holes are looking lovely btw, but as they are small, they are very efficient so overlatying the meshes on top shouldn't really have too much of an impact on the frame rate.
IPete2.
I think you can take you heightmaps and make meshes from them, then overlay them on top of your terrains!
You would therefore still be able to use the original code to trace which surface is under which part of the course!
The holes are looking lovely btw, but as they are small, they are very efficient so overlatying the meshes on top shouldn't really have too much of an impact on the frame rate.
IPete2.