well, I didn't know this before

[lonanivymaeve]

as a child I was quite fascinated by this




light shining through your body!
but one thing has always been bugging me about it...
why can you never see any bones...
unless the light isn't actually going through your skin so much as propagating along it!
it's called subsurface scattering

sorry if people already knew....
I just had an enlightening moment
(pun not intended xD;)