When I use the viewport to render, the result is different to the final render:
It's like the rendered image is brighter so I tried disabling the lights one by one to see if one of them is causing any problem. I also changed the light bounces from 12 to 1 but it made no difference. Neither Bloom nor AO or even changing the samples (from 128 to 64) makes a difference. I also tried rendering with 128 samples in the viewport and unfortunately it does not help.
Q: How to match the final render to the preview in the viewport?


