Boolean Union is differencing instead

[tug34857 (Austin Drill)]

I have two meshes that I am trying to boolean together and the boolean either fails or it instead acts as a MeshBooleanDifference and cuts away at one of my forms.

I’m not sure why the boolean is failing in the first place, usually if I just shift things a little a failed boolean will “magically” work but that hasn’t been working for this either.

I have attached the file I’m working on
BooleanTest.3dm (830.5 KB)

[pascal (Pascal Golay)]

Hello- please see
https://docs.mcneel.com/rhino/7/help/en-us/index.htm#information/troubleshoot_boolean_operations.htm?Highlight=Boolean

Anything there helpful?

-Pascal

[tug34857 (Austin Drill)]

Yes! the surface normals were reversed, thank you!