My render is "almost" complete...
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:
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:
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?