SEO Suddenly not working

[Chris Grantham]

I am trying to do the slab intersecting with a mesh to create pavement that follows the terrain trick, and for some reason nothing happens. This is something I have done many times, and SEOs work else where in the project so I am totally stumped. Anyone have any ideas? Thanks in advance!

-Chris

[vfrontiers]

My experience doing exactly the same thing is that there is a point where it stops working.

Workaround is to INTERSECT all your roads then make copies of them to use as CUTTERS for the MESH. The problem [for me] occurs when I use the SLAB that has already been INTERSECTED w/ the mesh as the CUTTER for the same mesh.

Yes, it works sometimes, then will stop working. But I've always been able to SUBTRACT w/ UPWARD EXTRUSION using a 2nd slab that matches the first. These can reside on an OPERATERS layer to not show during 3d sessions.