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Using blender 2.79 here. One of my file has this issue where faces appear to have an underlying mesh in edit mode, even with a freshly added cube. Any clue?

enter image description here

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marked as duplicate by Duarte Farrajota Ramos, Ray Mairlot, X-27, Martynas Žiemys, David Dec 12 '18 at 1:36

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it's looks like Z-culling issue when clipping distance is too big. In this case you may:

  1. Reduce the distance between start and end of clipping (in N-panel):

    enter image description here

  2. Try 2.79b or 2.79 master daily build, it have not this problem

  3. Do not pay attention to it - it is not affects on render.
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