Hi All, Got a question (again). I'm trying to apply a displacement material to a simple poly cube. Problem is it ends up with a gap on the edges. (see picture)

What I've learned from the web is that this is caused because the normals are facing 90 degrees from each other causing the black spot.

What I'm wondering is how do I solve this problem without adding a ton of geometry to my scene? I tried beveling but that just left me with two black gaps.