I've come to a little stumbling block in modelling/texturing, where I have a concrete bunker that meets a rock face, as if the underground bunker was created inside the rock, and is not quite complete. Usually what I would do, is either vertex blend the concrete into the other surface (Wont look right because thats not how…
That screenshot's from W:ET, not ETQW ;) The key to this transition is actually having a hard edge between the two surfaces. You will need to make sure there's enough detail modelled into the lowpoly to make it look believable (jagged, broken silhouette where the rock meets the concrete). A dirt decal on the wall where the…