[4-26] problem with gpu lightmass and raytracing

I’m having problems when I use the lightmass gpu, hair is not transparent in the hairCap and the beard is bursting with dots, can anyone tell me a solution? thanks guys.

estou com problemas quando uso o lightmass gpu, hair fica sem transparência no hairCap e a barba fica estourando pontilhados, alguém pode me indicar uma solução? obrigado guys.

gforce 1070
raytracing on e gpu lightmass