Black Eyes
I've noticed that a few character skins render with black irises regardless of the eye colour selected.
In texture shaded they show the correct colour that I selected but in iray (viewport) and in final renders the irises go black or very dark.
I don't think it's related to anything I'm doing because if I change to a different skin the problem goes. I thought maybe it was a compatibility issue with the shaping I had applied but I've found that if I put the problem skin on any character, in any scene, then it will happen.
Anyone know what's causing this or how to resolve it? I have several skins that are currently unusable unless I want black eyes.
Latest version of Daz Studio. Nothing fancy applied, just standard G3 characters, with character mix G3 morphs and standard G3 skins.
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Comments
If i change from photoreal to interactive then it shows the correct colour, in iray draw mode and render mode.
I don't understand what's going on.
Could you post an example and on which character you have this issue? Also which lights are you using?
Natsuko for Aiko 7 is the one that I noticed it on yesterday. I've seen it on others though, Cathy HD for Victoria 7 did it too (I refunded Cathy HD a while back so don't have it anymore).
I'll put an example up this evening.
I'm just using the Daz Studio standard spotlights but I'm certain it's not the lights.
I have four characters in the scene, three show the iris colour that I choose and one shows black irises.
If I swap the 'Natsuko' skin around on the four characters in the scene then the black eyes problem goes onto whichever has the Natsuko skin.
First order of business is to check if the Max Path Length setting in the render panel has been changed. The default is -1 (minus one).
I just tried it and get the same results. First one is Natsuko eyes and the other one is a P3D eyes.
The first one should be blue and much lighter...
Ok I think I found the issue.
It lies somewhere in Natsuko's conera, when I apply EcVh0 Iray Skin Shader for G3F on the conera it looks like its supposed to be
If you don't have the shader, I don't know how you'd fix it. Maybe someone with more skills in materials can answer this.
It is set at -1. Should I change that?
That's it, mine looks just like that. It's not something I've set up wrong then. Thanks.
Is there a fault with the character that the vendor needs to look into?
Anyone have a workaround to fix this with some surfaces settings change?
Both images have Natsuko's skin.
The first image has Natsuko's eyes, the second has eyes from Elisse by FWSA.
The Natsuko eyes I selected for the test image are supposed to be very light blue, they should be a lot lighter than the eyes in the second image.
I thought it was the skin itself that was causing the issue but it's obviously just the eyes that are broken.
Its defenetly the fault of the author. I just wonder why DAZ3D does not check for this. I had a similar problem with a character where the skin looked nowhere like in the promo images which is a no go.
I often run into the same thing, it's not just you. I didn't toy with any shaders, I just find another character whose eyes do render the way I want and use them. When possible I try not to kit bash characters but sometimes you just gotta do whatcha gotta do.
No, leave it at that. This is the default value and it's good for 98% of renders.
From your other posts it looks like an error in the shader you're using for the eyes.
I don't think this is a vendor issue. Natsuko's eyes are set up with refraction on the cornea, which makes them a little harder to light. I don't have the other characters mentioned, so I don't know how their eye materials are set up to compare. When I apply Natsuko's light blue eye color, her eyes render blue for me with no material tweaks or changes to the settings. Could it be the lighting you're using? This image is using one of Elianeck's light sets and an HDRI from an FWSA pack (keep in mind the noise is because I didn't let this render long... just long enough to develop the eye color).
Yes,
Refraction exactly is the problem. There is still a major bug in the interface between DAZ and iRay since the beginning. If light enters below a certain still steep angle, the refractive medium suddenly turns dark.
But since DAZ claims it a pure iray problem, there isn't any support.
So you have the choice:
This bug affects a lot of vendors and their products. Some I know stated that they had to implement non-realistic workarounds in their (water containing) products.