So with an overlap the printer just calculates it as a sharp corner and ignores whatever polygons are inside the mesh?
I thought the problem with overlapping meshes was with the pricing? Having 2 objects occupy the same space would double the price because the software calculated the area of each object even though they'd be made from the same printed material. Is that still a problem? Was it ever a problem, or have I just made that up?
That was a problem eons ago . The software now joins overlapping meshes so you do not get charged twice for over lapping geometry.
There is one issue you should be aware of with overlapping shells.. Please check this thread for a discussion: https://www.shapeways.com/forum/index.php?t=msg&goto=4196 9&&srch=netfabb#msg_41969