Hi Randy, there was some kind of problem in handling the trim curves on that particular surface, and if a surface has an invalid trimming boundary it can result in weird mesh artifacts like the display mesh leaking outside of the trimmed area like you're seeing here.
One kind of invalid trim boundary that can often cause this kind of a thing is if the trim boundary is self intersecting, that is if it crosses over itself in some area - an outline that crosses over itself does not have a clear inside and outside region anymore.
This may be caused by either problems in the application that wrote the STEP file, or in problems in the mechanism in MoI that reads the STEP file. It's hard to say what this case may be without trying to look at the original STEP file instead of only the final output. Sometimes handling the seam area of a closed surface can have various difficulties.
The surface can be repaired though, by copying the edge curves, doing an "untrim", and then retrimming the surface to those curves. Some information on doing untrim here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=444.4
Anyway, I did those untrim and retrim steps on your surface to repair it, the repaired version is attached. If you delete that surface out of the full model, you can then use File > Import to bring in the attached repaired version and then join it with the rest of the model.
- Michael |
