RibbonOffset issue on Rhino8 windows

[Vladimir_Stojanovic]

Hey, I got issue with RibbonOffset when using curve which i made using polyline on mesh.
It works fine when i create simple curve but not with polyline on mesh.
I also tried SimplifyCrv before using ribbonoffset but I get same issue.

The issue is that after I click “ok” the surface of lines disappear which i need for mold.
This is in preview (I also tried sweep 2 but i get same issue)

After I click “ok”

Thanks

[lander (CAD CAM CNC)]

Looks like you’re obtaining a ribbon derived from a high density degree 1 polynomial, most likely due to the mesh within that workflow sequence.

Try rebuilding the “curve” to lower density (maybe 200 points or less) and higher degree (maybe deg 3)?

Also, you can always re-network the ribbon geometry and change the density and degree etc.