Btw. why shadowcaulk? Models are there to cast their shadows (or those cast by a dedicated shadow mesh). This looks like a very uncommon way of doing things.
The wall modules won't seal the level. Why shadowcaulk over caulk then? Honestly, I don't remember why I do it now! I just remember there was a bad drawback with caulk that I discovered and it turned me to shadowcaulk, which did a better job. At any rate, one benefit is that you can freely turn off the shadow casting on any wall module in a concave room (conditionally through LOD or not), because if there is any light, it will be casting light on the wall modules, the modules themselves won't cast shadows inwards, to the room. The exception is the trim, but if it's minimal or the light is cast not too dramatically, the player won't notice. As regards to the material issue, don't worry guys i fixed it
Should I track this one?