A question: I'm planning to render the final image in 3K resolution. So is it allowed to resize the image to 1920X1080 (full HD resolution), raise the contrast a bit and to sharpen it?
Chromatic abberation was already mentioned.
1920x1080 is the max delivery format, thus down-sizing to that should be no problem.
Upsizing to 1920x1080 is also possible, but quality-wise not really recommended.
As with chromatic abberation, contrast and sharpness fall under the common and allowed adjustments.
Good to know! Thanks.