The new AI denoiser is absolutely awesome.
Here is a scene rendered at just 10 samples:
Yes, and have you tried the viewport denoiser in 2.83 alpha? It is absolutely fantastic.
I like to render at half the samples (sometimes even just one sample) at 200% resolution, then resample down to 100% after the denoise. I feel like this gives the denoise more data than simply doing more samples.
It’s freaking magical much of the time.
In addition I recommend doing a down resample with some sharpening, as the pixel filter in Blender tends to make images a little less crisp than what I prefer.
There is a VIEWPORT denoiser comming soon?!! Holly wooow.
It is allready there. Just download the 2.83 Alpha. You need an RTX card.
