I have an issue most have likely come across. I also know this is a common forum question, but I never seem to find a clear answer.
I have a series of closed solid polysurfaces that I am attempting to BooleanUnion together for an STL-format 3D print. All have no nonmanifold edges and no naked edges and are not bad surfaces. There are two isocurves that exist on one of the closed solid polysurfaces and I would like to MergeAllFaces, but as soon as I do that it creates a phantom surface that spreads across the volume and turns into a bad surface.
I have tried exploding the closed solid polysurface and joining it back. I realize there might be a sliver that is making it not one continuous planar srf (hence the two isocurves), but it is way too small to detect. I also tried BooleanDiff across each surface but failed.
I’m asking because I can no longer do any sufficient boolean operations and it’s more than likely due to those isocurves.