# Convert mesh objects to a Civillo terrain
CAD files that have a triangular irregular network (TIN) of 3dFace objects can be converted into a polyfacemesh, and then converted to a Civillo terrain.
Some applications allow for TIN models in DXF format. The best resolution for Civillo terrains will not be the maximum face count (e.g. 33,329,655 in the image below), but the next resolution down (e.g. 165,253 faces).
