Orbit tool is causing my model to look different

I’m not sure if I’ll explain this the right way but my model is a building with a wood floor. its a really simple layout. so far there’s no ceiling and the floor is just a wooden rectangle pattern. the problem is when i orbit the layout around parts of the floor look grey. Can anyone help me out here?

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Hello. Upload your file here, so we can have a look, please.

I figured out the issue. but thank you so much.

And the solution was?

deleting and reinstalling the floor. i’m not sure how it fixed the problem but it did.

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Sounds like z-fighting from 2 faces in the same plane.