When do you stop your renders and why?

bueller1998_df4ca4b697

I'm trying to determine how much visual difference there is between 90% and 100% for Iray renders.

Does anyone here stop renders at 90% or 95% or 98% for long renders?

Does the last 10% make difference for mirrors or anything specific that makes the time worthwile?

It seems like it could save a lot of time, but I don't wish to sacrifice quality.

nicstt

When it looks good.

This can be anything from 81% to 95. Occasionally I have to up the quality to 3 or 4.

There is diminishing returns very often for that last few percent.

The most important thing I said already, when it looks good.

patience55

I stop renders when they start turning funky colours like green, white or black. Sure wish all shaders worked all the time irregardless of walls, lights and engines.