Normal map uses different UVs than diffuse texture

[Fawfulthegreat64]

I know that normally separate UV layouts need to be separate meshes in submissions but I have a model here that uses a different UV map for the normal map (and the specular map).

I don't even know how to combine these for a render, much less somehow make a model with a separate mesh for those maps renderable at all. This is a bizarre situation that by my understanding of how models work I wouldn't have ever anticipated. I didn't even notice it right away until i struggled to get the normal map to look right and then started noticing parts just didn't line up. I'm not sure how I'd ever package this in a way that an average user would be able to get the materials setup properly. And here I was asking a question about the submission itself before i noticed this issue.