Why does this boolean intersection create holes? Here's a screen recording of me trying to create the intersection
I'm hoping clip the terrain block mesh to the border map for 3d printing, but the result is missing all but the southern side. I've recalculated the normals and verified both meshes.
I'm not sure why it's happening here, but if there's another way to fill the side holes despite the complex shape, that would work too.
Here's the blender file if it helps (only the meshes near the origin are relevant)
I have similar issues with blender 2.8 boolean modifier, but "fast carve" free add_on works fine so far. It could be a glitch in controls / settings for me, not sure anyone will have another answer unless your file is wrong some how.