My textures became shiny all of a sudden

It’s strange I was doing some texturing of a basic model that I imported into another model and then the textures suddenly became really shiny I know it’s not because of my gpu cause I have a backup of the same file and it looks fine feels like I did something

Yes, probably.

That would be extremely odd, as there is no reflectivity in SketchUp. Are you, per chance, taking about rendering?

We might be able to help you identify what you’ve got going on if you share the model or at least a screenshot. Otherwise can only say you probably did something but as a fix that’s not very satisfying.