orange128 寫:when i import autocad drawings into max, many surfaces are missing, is this a common problem, is there a quick fix for this?
answer u more details in here.....
when we draw 3d objects in autocad, some faces normal (vector) will be flipped (pointing away from u, so that u do not see the face) after imported into max.
There are several method to make it right:
1. The object should be an Editable Mesh, go to the polygon subobject and select the flipped faces in wireframe view and flip back their normal. This usually takes much time to do, so ..... depends....
2. Check Force 2 Sided option in Render Scene dialogue.
3. Use 2-sided option for the material of the object.