Problem with Stray Hairs Pixelating

DarkRepast

Hello!

I've noticed this happening here and there but now, I've been able to replicate it (unfortunately).

I'm working with the WF Matilda Hair for Genesis 8 (https://www.daz3d.com/matilda-hair-for-genesis-8-females), though I've had it happen with Rose Hair from OOT (https://www.daz3d.com/rose-hair-for-genesis-3-and-8-females).

As you can see from the screen shots, the black hair is fine. That was my first render. I then changed the color to white and ran it again. This came up with the stray hair problem that you see. At first, this was happening on a scene I'd been working on. I added a character to it and then the hair. I got the pixelated hair. Then, I rebooted, started a brand new scene, and I got the Black Hair results in the screen shot. Rebooting Daz does not fix it. You have to start a brand new scene in order to get a proper render. 

I've also included the Rose hair problem. While you can't see it on the edges, you can tell that the hair in front of the mainbody of hair is pixelated too.

Other factors:

1) I'm using OOT Dramatic Lights (OOT Drama Light 02) However, I turned them off and it actually becomes worse. 

2) I'm using the default HDRI. I just tested this with Sun/Sky only and it continues to have the problem.

I didn't see anything stick out in the log files.

And that's all I've got. Any thoughts?

DarkRepast

I switched drivers to the Studio Driver from the Gaming Driver (the gaming driver is currently newer). That did not resolve the problem.

richardandtracy

What version of DS? There seem to be opacity oddities being reported with the first general release of 4.15. This has been reported with hair, leaves in UltraScenery and volumetric lighting blocks. They all look to me to be related, but whether the problem is in DS, the version of iRay used or just the way the two talk with each other in DS4.15 hasn't been resolved.

Regards,

Richard.

DarkRepast

richardandtracy said:

What version of DS? There seem to be opacity oddities being reported with the first general release of 4.15. This has been reported with hair, leaves in UltraScenery and volumetric lighting blocks. They all look to me to be related, but whether the problem is in DS, the version of iRay used or just the way the two talk with each other in DS4.15 hasn't been resolved.

Regards,

Richard.

It's 4.15.02

Petra

Hmm, I am using 4.15.02 and have not yet encountered this problem, I will keep an eye on it, thank you for the screenshots :)

DarkRepast

I happened to have 4.14 still installed on my computer. Lucked out. That works fine. I'll just stick with that until they release a patch.

mikethe3dguy

I've been having this problem as well. Same version of DS and up-to-date Nvidia drivers.

devinblk7

Same issue here. Thought it was just noise or something and let a render go overnight. The rest of the hair looks amazing while the flyaways have these nasty dots all over them.

devinblk7

I found a work around while waiting on a response from support. Set your cutout opacity to 0.99. 

onyxlee_9b3cce7f35

Thanks, man! How did you find this solution? It took me literally days and countless hours trying to solve this issue. Why would this cause such a weird problem? For newcomers with the same issue, here is the screenshot.

devinblk7 said:

I found a work around while waiting on a response from support. Set your cutout opacity to 0.99. 

You can actually choose all these highlighted materials and change their cutout opacity all at once to anything under 1. That will solve all the problems.

andrewbeymer

Thank you for this. I've been banging my head against a wall for a week trying to fix this problem.

Leonides02

Great solution. Thank you.