Hello, I have read this topic being discussed: http://onelab.info/pipermail/gmsh/2019/012729.html
One of the comments you left was that user can merge the STL using built-in and then switch to Opencascade, as long as one doesn't use boolean operation afterward. However I do need to use the boolean operation to subtract the imported object (3D). Is it some other tricks to overcome this issue? Also, this imported object has a section above ground level and a concave section below ground level. Would you mind to give me some guidance on meshing this stuff? I dont think it is going to be a straight forward BooleanDifference. I have attached a schematic to illustrate my case. Thanks! Junting Chen
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