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I recently rendered a scene in blender after following a BlenderGuru tutorial and made sure to save the image. After closing Blender and going back in, I am able to open the image up in the UV Image Editor (below)

enter image description here

However, after selecting "compositing" and going into the node editor, I can't seem to view the image with the "viewer" node. The only option I seem to have is to re-render the whole scene again in order to see this in the node editor?

enter image description here

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    $\begingroup$ Render Layers is a node which provides information from Render Layers, and it's empty unless render was done. $\endgroup$ – Mr Zak Jun 21 '18 at 20:46
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Use an add Input>Image node.

If the image is already loaded in the UV/Image editor all you have to do is select it. If not you have to import it.

enter image description here

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  • $\begingroup$ I have used the image node, however the next step in the tutorial was using "IndexMa" from the Render Layers node, which the Image node doesn't have. Any suggestions? $\endgroup$ – AddB Jun 22 '18 at 20:20
  • $\begingroup$ Well that is a different question that should be asked separately. Basically you need to save in a format that can save such information: OpenEXR, and you need to explicitly save such information by connecting the appropriate sockets to an output node. Please ask in a different post the goal of this site is not to give personalized-per-project support, but to answer concrete questions. $\endgroup$ – cegaton Jun 22 '18 at 20:54

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