how can you make a 3ds model export to an hmp model?Thx

Export the terrain as FBX. Import the FBX in MED and recalculate it to a hmp-terrain.

Be sure you only move the vertices at z-axis only. Otherwise it wont work and you can only use it as a model.

thx

i tried that, but it stills only let me save it as an mdl file.
it says cant convert no regular grid.

That means, that you have moved the vertices in all axis (x, y, z) while modeling. Convert to hmp only work if every vertice only moved up or down.

HMP is like MDL. But hmp "models" are only sculpt in z axis. If you make a plane and pick one vertice, than you must move it up or down. But not to the right or left. Then after export it should be work.

Hope this helps. Otherwise you can youse the model as terrain too.