Can anyone explain this? Using Quarker hair on Miki. Hair that intersects body also severs bodies shadow on ground.

It looks like yet another firefly bug.

xantor, I started to get this when I raised RayTrace map size from 512 to 2048.

This is strange - I wouldn't have thought that the shadow map size would have any effect on ray tracing. I'm not absolutely sure from the image above what the specific problem is - is it the hair at the front, or the tatoo-like thing on her back?

Raising the map size should make the shadows look better unless there is not enough memory available for firefly to render shadow maps that size. You could try changing the shadow min bias number and see if that has any effect.

Paul, That tattoo thing is the RayTrace shadow. Light is square and facing down at her head at 45 degrees. All is "visible" with shadows enabled. Attached: Hair severs body shadow (arm) and makes its own strange patterns on ground. Same as on back. Maybe the overdialing of the hair (figure) has turned its normals. WAG

Mmmmm. It's almost like the shadows are ignoring the hair morph/magnets that you have applied. Have you tried a depth mapped shadow - bias 0.01, map size 4096 (yes it will render slow). If that works, it means it's a r/traced shadow issue. If not, then maybe the hair is blowing out your memory, so the shadows are reverting to it's zero'd pose.

Ehhh, Guess I'll let it slide. Appreciate the responses but too much to do besides bracket Ray Trace. Just hoped someone had seen it before. Paul, Love shadowmaps but you sacrifice transparency on hair props. Well maybe not at 4096! lol

I have seen this before in some of my renders. I'll have to check the lighting and shadow setup. It is most disconcerting.

At a map size of 4096, shadows maps are very very similar to ray/traced shadows, except they have nice blurring, and don't get tangled up in dyn hair.

I have seen the problem before and posted it, both here and at Runtime Dna, since I first noticed it with Apollo Maximus hair, and incorrectly thought it was specific to that figure. Essentially I was told my settings must be wrong in some way, but nothing I have tried has gotton rid of the problem, including using the poser presets. I gave up and just ignore it, now :-)