There seems to be a bug with Rhino 6 when projecting or intersecting curves (or their extrusions) with a surface or a polysurface.
This first occurred during projecting the curves in Grasshopper.
Just copying and pasting the same geometry in Rhino 5 , then projecting or extruding then intersecting, works as it is supposed to.
Fixes tested, but did not work:
- Rebuild the surface.
- Rebuild the curves.
- Project from top view.
- Use the curves for trimming in top view.
The only thing that is working is Rhino 5, but that’s obviously not a solution!
Attached is a sample
Bug_Projection.3dm (176.9 KB)