Help with Importing DXF
29-Jan-95 13:37:27
Sb: #149700-Help with Importing DXF
Fm: Gary K. Sim 71175,2104
To: Chris Johnston 71505,1752
<<but many of them had faces missing…one sided walls for example>>
This is fairly typical with AutoCAD files, it usually means the surface normals
of the missing materials are facing the wrong way. If you FORCE 2-SIDED when
rendering and the missing faces show up, the normals are the problem. Either
flip the normals in 3DS, or re-do them in ACAD. Preferably, draw them right in
ACAD to start, i.e. draw the surfaces CLOCKWISE is you are looking at the side
of the object which will face out (& you want to show) and COUNTER-CLOCKWISE if
you are working from the back face of the surface.