@massimo said: You can, for example, draw the projection of the roof cutting your plan, then use the "project faces on face along vector" in order to extrude each part of the subdivided walls on the respective gable of the roof. Looks cool! If it works with SU8 further explanation is required! Eg: Will it work between objects in different groups?!

Agreed! To get my geometry into its own separate file out of Autocad, I normally will select it all and a wblock command which will write it out as a block - essentially its own file. Then if I need to I go into that file and audit and purge and remove unwanted layers. And I tend to export from CAD in phases. I NEVER ever ever try to export everything at once. I wil generally make a large "X" symbol in my CAD file and then I always export that with everything that I export, so I can always line up that X inside of SU to make sure it all lines up correctly. I export first my topo, then a layer for fences, then a layer for concrete, then building footprints, etc. THat way I can deal with them all much easier inside of SU, separate from one another. I once had an old instruction sheet of how I like to export my CAD stuff. I'm sure its still around but I think its very outdated and I've updated some workflow issues. I should get that out and re-write it. Chris