Problem with Jumbo Jet VIP Expanded for Iray
andreretogasser
Posts: 256
https://www.daz3d.com/jumbo-jet-vip-expanded-for-iray combined with with G3f and with G8f makes dark spots on the forehead! Someone knows how to fix the problem?
Problem.jpg
512 x 429 - 121K

Comments
Are the figures away from the origin, especially backwards (negative on the z axis)? If so try parenting everything else to the focal figure and then move that to the centre of the world.
Not quite sure if I follow your train of thought correctly .. I will couple and center everything on the scene tree. But I will not have time until the weekend.
Try expanding the hair cap as well (select the hair > parameters > look at the morphs and there should be one regarding the hair cap). That usually fixes it for me.
Updated to add: another fix is to go into your render settings and change "instancing optimization" from auto to speed.