use numpy.clip to ensure a minimum light absorption of 1. remove any extra +1 and -1 terms that previously adjusted for that minimum.
use numpy.clip to ensure a minimum light absorption of 1. remove any extra +1 and -1 terms that previously adjusted for that minimum.

ahh2131/mchisel,arruda/pymclevel,codewarrior0/pymclevel,arruda/pymclevel,codewarrior0/pymclevel,mcedit/pymclevel,mcedit/pymclevel,ahh2131/mchisel