Recognizing the answer to this might differ depending on the media you're drawing for, but...
I was wondering what zoom levels people use to paint on? Do you create a huge file (300dpi, 5000x5000 pixels) or just a small one, 1:1 with your screen resolution? Do you zoom out to 50%, or 25%?
Let's assume this is just for a random idea that you'd like to get out of your brain and onto the screen.
Just a general idea would be great, as I realize different programs render zoom levels differently (as in: Photoshop has some issues with layer placement on certain zoom levels, and aliasing discrepancies as well)
Wrong forum to post this in probably - I'd request it be moved.
You do whatever works basically - if you're just thumbnailing resolution is no big deal. But anything you want to print should be at 300dpi and whatever dimension you want. Pretty much all your work should be at 300dpi just in case.
What would Caravaggio do?
In PS I pretty much always work in 300dpi, no matter what I'm doing. Mostly I'll make a 3x4 scale canvas with the longest side being around 6000 pixels. My zoom level, for the most part, is out enough to view the whole piece. With a canvas that size, and on my screen, that's around 6-8%.