Marerials mental ray black

V material Editor kogda ia delau Ach/Design material for mental ray render, slots 4ernie, no material nakladivaetsa i v scene viden no ia ego v slot viju kak plosko-4erni, neznau 4to delat. Otkrila scenu v tutorial na ety temy tam normalnie, pomogite pojalusta kto znaet, spasibo bolshoe.
Yulia.