The Firefly engine is truely optimized for some of the issues that Poser throws at it. What you're seeing may be one of those issues. Carrara "sees" the polys a little differently than Firefly. For the hair, you might actually try reducing the hair count in Poser a bit and then change the thickness etc. in Carrara after import. Unless I'm animating with dynamic hair, I'll actually use poseable hair instead of dyamic hair if the render is to be done in Carrara - just for the speed reasons On the interior of the bend, this may be a Soft Shadow/normals issue that can be fixed by simply moving the light source slightly to the left or reducing the size of the shadow light source (the numeric value in the size portion of the soft shadows pane) Carrara will use almost all of the processors when rendering.