Image washing out

Advice please, my image keeps washing out. I’ve tried the suggested Turn Sun or shadows off and its worse. I would like to see the tiles on the wall and floor at all times without the environment or sun beaming across the image. Any ideas please? I cant make sense of where the light is coming from either, it moves as I rotate the image not necessarily from a window or door, sometimes through the cut-through view
Many Thanks, K

Looks like you have z-fighting, which is two faces fighting for visual dominance. Remove the wrong face.
Attach your model for a more accurate solution.

thanks for the super fast response, I’ll have a try at fixing it now i have the term for it


thank you so much! Problem solved, it was z-fighting. I create the tiles on a componant so i lifted / moved all those in 1mm and the flashing has gone