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I'm rendering an image with a transparent background, which will eventually be included in a figure with a white background. In the Image Editor, blender displays the transparent regions as a grey/black checkerboard pattern. This is helpful, but I would like to get an idea how my image looks on a white background whenever I re-render.
Is there anyway to temporarily set the background color of the Image Editor?

Here's what it looks like, and as you can see, it's a little hard to tell if the render would look pretty on a white background:

enter image description here

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Use the Compositor, with this node setup:

enter image description here

It just takes the areas with an Alpha value, and replaces them with the color specified in the Alpha Over node.

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  • $\begingroup$ @DanHickstein If this answer has satisfactorily answered your question, consider marking it as accepted by clicking the checkmark next to it :) $\endgroup$
    – gandalf3
    Sep 3, 2014 at 20:10
  • $\begingroup$ Oh yes, the most important part! :) $\endgroup$ Sep 3, 2014 at 21:56

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