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When rendering overlapping meshes (I know this is bad practice, but in this case it is done purely out of curiosity) You get strange artifacts.

However, these differ from the viewport render and the F12 render:

Here is a screenshot of the viewport render in camera view:

enter image description here

And here is the render:

enter image description here

Why are these different?

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Rendering has higher sampling per pixel, hence the precision, diminishing visible moire.

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  • $\begingroup$ I rendered them with the same number of samples though. $\endgroup$
    – gandalf3
    Commented Nov 14, 2013 at 23:34
  • $\begingroup$ Cycles? There could be differences in clipping for instance, resulting in different precision, not sure though. $\endgroup$
    – kivig
    Commented Nov 14, 2013 at 23:38
  • $\begingroup$ Related: blender.stackexchange.com/a/2730/599 $\endgroup$
    – gandalf3
    Commented Nov 15, 2013 at 2:42

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