Every time I am feeling confident with Rhino it makes me humble again. I am trying to build a core that I can use as a subtraction from another solid. I am using cylinders, spheres and rectangles to build the object. Depiction below:
. After much manipulation I have been successful at joining what you see in yellow but the remining solid will not join as I get Boolean Union failed nor will it join the two pieces.
I wish there was a dialogue that came up to tell me why it failed or a tutorial that poped up to tell me how to fix the problem as I am expending significant time trying to troubleshoot this issue.
You have two closed polysrfs. On the ‘big’ one, remove the flat faces. Then explode the ‘cigar’ member and split with the ‘big’ one. Then they will join.
What I described had no Boolean functions. Remove flat faces with extractsrf, delete flat faces with delete, explode cigar with explode, split remains with split.