When mesh came out, marketplace added the ability to state whether a item was "No Mesh", "Partial Mesh", or "100% mesh", as well if it is fitted mesh. I propose that with the addition of PBR, it is made so we can see if something is using PBR with "No PBR", "Partial PBR", "100% PBR", as well as a flag called "Blinn-phong Fallbacks" (MAYBE? Since some people will be using non-PBR viewers apparently). This will benefit creators and buyers in the following ways: Buyers will know if content is using PBR or blinn-phong. Creators will be able to clearly disclaim in a visible, uniform way that something has PBR without fallbacks. Buyers who use old viewers will know if content will be compatible with their viewer. It would be useful if this is a searchable filter too!