Thanks! I'm not happy with the trees, they are 4 Tris LOD ones, supposed to be replaced by a detailed versions on close distance, but I never added that. It is in the original generator walk-through mode tho, that's in Blitz3D for windows.
The height map is loaded as bmp, greyscale. If not found, a simple random map is made, using some weird mixture of sinus,random,noise and smoothing.