Yes I know how thats not the problem.
Anyways,
I made a model for a MLRS (image1) when I tried to apply the skin (Skin) in RenX it didn't actually apply it and was just grey. (image 2) When I try opening in W3D viewer it just looks.... weird and flickery.(image 3) Its the first time I tried applying a new skin to a new model so I really don't know whats wrong.
I am not sure on this one, but when I was in school i used 3d Studio Max, and I just applied the skin in there. Although I was not moving it to a game. But try applying it into gmax. Then when you send it to renx see if it is still there. I am not sure on any of this but it may be a solution