Nostil shadows (Zbrush)

small99

I can't seem to get the nostril to cast a shadow when doing a render in zbrush

they always seem to be illuminated and it's confusing me as what I'm doing wrong with the nose 

iam717

holes? you can also mask the hole areas and put a completely black material on it, i use the claybuild brush and MRGB option and click the fill color option to do this, should solve it, also looks like holes to me if they are not just my 1st thought.

pxgeek

try maxing out the strength slider in bpr render settings

kanga

Extend the pipe holes up if you don't want to see caps. The holes look open so close them.