![]() ![]() Note that due to the orange parts sharing (at least partially) vertices with the wanted outside, this has to be done manually. Due to the nature of the part, in this case, it is rather simple: Simply removing the circle of vertices that spans up both the plane, as well as the cylinder, marked orange results in all internal surfaces getting removed. So the best solution is to ensure the parts don't contain such volumes encased by a non-manifold surface in the first place. This is what happens when Meshmixer does just that: you are left with the cone half and some inverted artifact areas. Or even no more outer shell as the easiest solution is to just stitch that lower surface and discard the rest. This solution leads to two intersecting and manifold shells - a cylinder overlapping the drilled holes and the body with the drilled holes - which then promptly get treated with a boolean union. In the following picture, I have hidden part of the geometry to better show the problematic internal surfaces in orange:Īutomatic processes such as Meshmixer or Windows 10 3D builder interpret such an internal, one-sided open cylinder as "This probably is missing a surface on both ends". The body you modeled consists of a non-manifold shell: There exists a fully enclosed shell on the inside of the item that tries to define an "outside" of the body. ![]()
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