It's hard to fit your PT models into CGI scenes convincingly because your lighting is so flat, all coming from the front, sort of like a ring light effect but using several strip lights I think. It doesn't look terrible, but it's not "soft" (big diffused key light) like traditional high end / glamor work, there are hot spots and specular highlights typical of direct lighting, and it lacks shape and direction. So wherever you put the models will have inconsistent lighting. Have you guys tried softer light, with a little more direction? Is there no room for a larger diffused light in that little studio or did it complicate the masking? It's not really an issue for PT, where the wow factor overrides everything, but it's not as sexy as it could be.