By broken texture maps do you mean Studio cannot find them?
...Studio4 finds them OK, it just doesn’t’ apply them to the figure properly. I am using the Tindra Thompson MAT, as it is the only one I have with a freckled texture. I tried fixing through the Surfaces tab, I zeroed out the texture and then tried to apply it again, nothing worked. Even the default texture for the base figure (Steph4) wouldn’t load right. I have the entire character (Steph4) selected in the scene tab when I try to reset the MAT so it should work just like it does in Studio3A.
I’m not even using Genesis or any of the body shapes for Genesis, just the normal Gen4 figures so I don’t understand why the texture keeps getting messed up. The only MATs that I can get to load correctly are the standard V4 ones.