Hi,
today I got an idea to use a user computed heightmap. The height and normal computation would take place on the user side, physics engine would only ask for the "z/height" coordinate and normal for the supplied "x, y" coords. These would be computed on-the-fly. Then this information would be used for collision detection. With this varying heightmap resolution could be achieved and we could also get rid of the dependency on squares. Is anything like this possible with bullet? Thanks.