Polysurface problem

Rhino Rhino for Windows
1

I’m experiencing problems with polysurfaces I got from a Bentley steelworks user through *.dwg and *.dxf

Many of the polysurfaces have their faces flipped towards inside and I can see into them.

I can explode and flip and it Looks alright, however when I merge the surfaces to a polysurface again I can see into the polysurface.

I have tried a few things like shrink trimmed surface to edge, rebuild, change degree…

Most succesful so far is when I explode the polysurface and extrude using the extrude surface command.

When dragging with the mouse I get this approximated shading which looks bad and I was wondering if anyone has a clue what the issue is?

16_09_12_rhino_surface_problem.png1290×681 30.4 KB

2

Have you checked to see how far they are from the origin?

Andy

3

yes, the units are millimeters and the file is georeferenced in new swiss coordinates.

However this might be the problem. Actually it first occured when I moved non georeferenced geometry to the proper coordinates. I moved everything really close to the origin and the issue isn’t visible anymore.

Is there a problem with the maximum coordinate space?

4

Have a look at: http://wiki.mcneel.com/rhino/farfromorigin