Believe me, it's easier said than done.
For example, I don't have an Nvidia GPU and render using my Ryzen 7, I have to use pretty much every possible trick to speed up render times and I render in 720p.
After half an hour, I still get noisy renders.
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I could try and let the render cook for more, but the quality/time spent ratio goes down a cliff pretty quickly.
So I'm forced to use an external program+photoshop to get rid of the noise, at the cost of losing details and sharpness.
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One day I'll be able to afford an Nvidia GPU and I'm going to redo the entire game in 1080p. I'm saving every single render as a scene on an external drive just for that
Also, I suck at lighting things up properly, but I swear I'm trying to learn!