I'm trying to setup a VRayMtl with Railclone Color maps. The maps work fine except in the Bump Map slot. No bump effect applied, it doesn't matter what or how many submaps are plugged into RailClone Color or if they are VRay Normal maps or traditional black and white ones. As soon as I use any of these maps on its own, the bump works fine, so it isn't a problem with lighting, UVs or anything I can think of. As soon as I put them in a RailClone Color map slot again - zero Bump. No other setting (Tint etc. ) is enabled/changed.