something pleasing to the eye and to the soul is ok with me.....digitally corrected or not  :)
by the way....you can dodge and burn with photoshop also ... i use it to "digitally correct" my images all the time :)

i've noticed some folks get irate when you add a photograph to a terragen or bryce image as well...to me anything that i think enhances one of my images makes me happy...and thats the only person i'm trying to please  :)