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Caustics in viewport different from render

 When I have caustics turned on, the viewport shows nice, smooth caustics but when I render, it's made up of a lot of little dots. I know I could crank my render times way up and those dots will even out. But to save time, is there a way to use the caustics algorithm that the viewport is using? I know it won't be as accurate, but it actually looks pretty good for something much faster.


thanks

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