I am trying to create a terrain surface for laser slicing. I have several publicly available terrain surfaces. The surfaces have some overlapping, but the overlapped faces are not same on both surfaces.
I tried to extrude individual surfaces, and join. There are internal surfaces remained.
I tried to extrude individual surfaces, and do boolean operation: Object A union (Object B difference (Object A intersect Object B)). There are still internal surfaces.
Can anyone tell me how to do this?
I tried to cut the overlapped surfaces by bisect tool at a specific coordinate (say at certain $Y$) on both surfaces, then extrude and join. but there are still internal surface.