When i know i need 3000 x 3000 pixels (whatever inch size that means is another problem) and render them there is no adjustment in terms of recalculation. Full stop. Just a change of dpi values to correct the inch size. The pixels stay untouched and the same. The only adjustment you have to do always is the change to CMYK to go to print. And this can be a BIG surprise. Try a full green in RGB and switch to CMYK. Fun!!!

One day your ship comes in - but you're at the airport.