Volume of a solid brep is negative

Rhino Rhino for Windows
1

When will it happen as that?Is there a solution to solve this?

2

Maybe post the object here - it’s possible that the object is invalid, non-manifold or something else.

If you run Explode, RebuildEdges, then Join, does it join back up into a closed manifold solid?

3

Hi @duzhengjie1

That is a very well known topic, which solution can be easily found on the forum.

Regards

4

Hi @bbalbastre,

Sure that’s (still) an issue in non-uniform scaling in Grasshopper. But not in Rhino. Need to know where the OP is having the issue…

Regards
Jeremy