Weid stuuf on the viewport

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1

Hi guys, hope you can help me, I have this weird shading on the view port and I don’t know what is it.
I have a Nvidia 1070 with the latest drivers (win 10).

exterior
exterior1920×1017 477 KB

2

Without a blend file, it is really hard to say… but is there any chance you have duplicated the mesh?

3

Thanks but is not that, happen from the beginning.

screen
screen1920×1017 299 KB

4

Got it, was the clip start value. to low, like 0.00001 or so.