Boolean union failed

Hello! I’m trying to build a 3d model of the ground but I can’t complete the boolean union, I don’t know why…
Could somebody help?

Ground.3dm (139.8 KB)

the boolean operations works using the intersection between the objects, if a boolean operation fails, normally is because the intersection fails. use the command _Intersect to see if the results are open curves ( should be closed to work well)

Hi @mcrispi092

Something is wrong with the center part - all the other parts bolean just fine. The center part has a really small sliver at the seam. Get rid of that (explode the polysurface, delete the thin surface and match the edges and cap - or rebuild the original curve) and it’ll boolean just fine.

HTH, Jakob

Ground fixed.3dm (359.4 KB)