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My render is "almost" complete...

enter image description here

It took almost 5 hours to render the center object, and from now on Blender will render nothing but white pixels of the Emission background all the way to the edges.

According to its estimations, Blender is going to spend 2 more hours rendering all the white background:

enter image description here

I don't need Blender to do this; I could easily bring the current data into an app like Photoshop and flatten to get the background to be white.

But I cannot save the image in its current state:

enter image description here

I cannot take screenshots and combine them either - it would take too long at 100% (Image is over 8000 pixels wide).

I'd like to restart my computer, or start another Blender project, etc... and would like not to have to wait 2 hours.

Can I save the current, unfinished state of my render as an image if the elements I need have already been rendered?

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  • $\begingroup$ This looks like an instance where a Render Border would be useful, then compositing in the rest of the white. $\endgroup$ – Scott Milner Sep 8 '17 at 0:28
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Yes, you can. You will simply click the X beside the Render % or press Esc to cancel the render. Then press F3 as usual and it will save the rendered portion to your desired format/location. The unrendered part will be black if saved as a JPEG and transparent if saved as an Alpha PNG.

Just to prove it ;) here you go:

enter image description here

Here's the canceled render of the default scene saved as a JPEG:

enter image description here

EDIT: As was mentioned, Render Border can be useful in certain circumstances. The problem is it's always rectangular (so it wouldn't have helped in this situation with a circular object) and it's usefulness is relegated to instances where you use multiple render layers. Otherwise, you can simply crop the render dimensions as close to the edges of your scene as possible which does the same thing.

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  • $\begingroup$ Great! Thanks! What is Render Border? $\endgroup$ – MicroMachine Sep 8 '17 at 0:40
  • $\begingroup$ @MicroMachine - You're most welcome. Render Border (Ctrl-B) draws a rectangle within the camera frame. Anything inside the border gets rendered, anything outside is not. The problem is you can't draw freehand shapes so it's usefulness is stunted. $\endgroup$ – bertmoog Sep 8 '17 at 0:42

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