Render issues with hair (fixed)

reine_law_0cc9bf9349

I dont know what is happening with my render, specially the lines on her forehead.  Thoughts?  What am I doing wrong?

Thanks

Richard Haseltine

Try changing the Instance Optimisation in render Settings - to Memory irf it is Auto though it's the act of ch aging that matters as it resets the world cenre, these are usually the result of precision issues when the figure is away from the origin.

hansolocambo

Instance Optimisation in render Settings

Cool, I've never even noticed this option. I'll check on that, thanks Richard.

I dont know what is happening with my render

You could also check in the Parameters Tab if your hair has morph options (often in the Hair > Actor menu).

Most hair content creators provide morphs to expand the whole hair + cap. Raise that default value of 10-15% and your problem will disappear.

Reason why this is happening :

On Daz products it's common to use a separate mesh called hair cap, or more accurately a skull cap. Object on which is projected a texture of hairs. In order to hide the genesis' skull and its skin texure.

This cap mesh is often a basic copy of a portion of the skull's geometry. In my opinion, providing a LIE texture (torso/face) for the Genesis with the same texture of hairs rather than projecting it on an extra cap geometry, would avoid this common issue once and for all... but anyway :

- If your cap's geometry intersects with the Genesis' skull geometry then those artefacts happen. So expanding the hair (use a provided morph, not the Scale slider) will avoid intersections.

- or this could happen if your Genesis is subdivided. But the cap isn't. So activate subdivision at render time for the hair cap, if Genesis' Mesh Resolution > Render SubD Level  is set at 3 let's say, set the Render SubD for hair at 3 also. This should solve or avoid most of the issue.

reine_law_0cc9bf9349

Thanks so much for help. I'm away on work trip but will try when I get back home. 

reine_law_0cc9bf9349

Thanks for help.  Did a quick render and tweeked some things, as recommended above, and issue was fixed.  Appreciate the help.