Anyone ever run into this issue when smooth-mesh-previewing in

I think i've seen this video, usually followed by a crash. delete history?

unfortunately deleting history does nothing to remove this. It also doesn't crash. Thanks for your reply though.

I'd say non-manifold geo etc.

Run a mesh->cleanup.. and tick on the relevant "remove geometry" options.

I'll give that a shot. I've started over now and it hasn't appeared yet. But if it does I'll try. Thanks.

I had the Problem with doubled faces, the meshcleanup should be the way, if thats the problem