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I am using Blender for daily work on 2540x1440 external display. I usually work in full screen layout and sometimes i want to preview scene in cycles. Problem is that working area is over 2000px wide and it totally waste of time to wait for each sampling iteration. My question is: Is there any kind of method to decrease the resolution on preview. Something like quality switcher in After Effects (25%,50% full etc.)

For preview purposes it could reduce the pixels like 2x 4x or 8 times. This way instead of rendering full resolution the "pixels" could be bigger allowing user to preview faster.

Thanks For Your reply!

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  • $\begingroup$ Hello, have you tried reducing the number of samples in the viewport ? Also, if you have a compatible GPU, you can use viewport denoising and further reduce the samples $\endgroup$
    – Gorgious
    Dec 9, 2020 at 12:16

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There's an option under Render -> Performance -> Viewport

enter image description here

You can also define a render region with Ctrl + B, to keep your resolution detail but only render a portion of the viewport.

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