I don't know why "Ambient Luminosity" is such a wonderful art term D:
... ah yeah, it has nearly nothing to do with the term you just posted, but maybe you could help me with a term in english, I'm sure its should exist... but I don't know it.. in spanish it's "claroscuro" (light/dark) and it's used to explain something about the balance of light and shadow (and no, it's not "contrast" D: )
I copied this from the m-w.com dictionary.
i love this term actually.
One entry found for chiaroscuro.
Main Entry: chiar·oscu·ro
Pronunciation: -'skyur-(")O, -'skur-
Inflected Form(s): plural -ros
Etymology: Italian, from chiaro clear, light + oscuro obscure, dark
1 : pictorial representation in terms of light and shade without regard to color
2 a : the arrangement or treatment of light and dark parts in a pictorial work of art b : the interplay or contrast of dissimilar qualities (as of mood or character)
3 : a 16th century woodcut technique involving the use of several blocks to print different tones of the same color; also : a print made by this technique
4 : the interplay of light and shadow on or as if on a surface
5 : the quality of being veiled or partly in shadow