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Eyes Rendering Poorly in Iray [Solved]

2busy4render2busy4render Posts: 81
edited June 2018 in Technical Help (nuts n bolts)

I've been working on this for a few days without improvement so I'm looking for help: The eyes and the middle of the table have black dots. I'm using 4.10 and have the render settings set back to default. I created a ghost light that is above the table, and is set for 200 kcd/m^2. 

I've been running into this problem a lot lately, but usually it was because the dome was turned off so turning it back on fixed it (for whatever reason). I'm trying to keep the scene as dimly lit as possible.

And I am still very bad at Iray. Thanks in advance for any assistance!

 

spooky eyes.png
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Post edited by 2busy4render on

Comments

  • Richard HaseltineRichard Haseltine Posts: 102,837

    You may need to increase the render Quality, so that Iray is fussier about what it counts as done (the problem areas will always be the last to count as done, it's a matter of making sure they are acceptable). You could also use the Spot redner tool to redo those areas (set it to Render to new Window in Tool Settings), then save as PNG or tiff and layer over the base render.

  • OZ-84OZ-84 Posts: 137

    I had this problem too with some eye assets ... and i couldnt solve it. First the eyes start to render fine and than, after a while, black pixels arround the eyes show up. This has nothing to do with renderquality or rendertime. The longer this renders the worse it gets ...

    These here was very often creating these "black holes"

    https://www.daz3d.com/project-eyeray-next-gen-and-merchant-resource-for-genesis-8

  • 2busy4render2busy4render Posts: 81

    Thanks, Richard & Oz. I'm first trying upping the render quality (while I'm at work) and if that doesn't fix it, I guess trying to swap out the eyes? I think I was using Edward 8 with blue eyes but maybe at some point I changed them. 

  • fastbike1fastbike1 Posts: 4,078

    Some eyes have issues (black dots) that require the Dome to be ON when rendering. You can always adjust overall lighting to compensate.

  • 2busy4render2busy4render Posts: 81

    I tried increasing the render quality, then adding light, and then swapping the eyes but without any luck. Fastbike1 had the solution, I turned the dome back on and it rendered fine. Still not sure why the dome would have an impact on an indoor scene but it seemed to fix the issue. Thanks all!

    Dome Off.png
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    Dome On.png
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  • fastbike1fastbike1 Posts: 4,078

    @2busy4render "Still not sure why the dome would have an impact on an indoor scene"

    AFAIK, no one has been able to explian why this happens. It doesn't happen with all eyes, but when it does, it's always a render with dome OFF.

     

  • FSMCDesignsFSMCDesigns Posts: 12,783
    fastbike1 said:

    @2busy4render "Still not sure why the dome would have an impact on an indoor scene"

    AFAIK, no one has been able to explian why this happens. It doesn't happen with all eyes, but when it does, it's always a render with dome OFF.

     

    Could be that the lack of a dome in the background gave the reflection in the eyes nothing to reflect (white background only). With it on, there was something to reflect

  • fastbike1fastbike1 Posts: 4,078

    @FSMCDesigns "Could be that the lack of a dome in the background gave the reflection in the eyes nothing to reflect"

    Can't say. It doesn't happen with all lights. I haven't done any further troubleshooting since I rarely render without Dome on and I don't generally see it the few times I don't use a dome.

  • 2busy4render2busy4render Posts: 81

    I think I must have tried a lighting preset at some point that turned the dome off, and I didn't notice it. I wouldn't turn it off on my own. But I can verify that the other figure in the same scene (G8 female) didn't have the same problem with the eyes. I don't mind weird problems when there's a solution. 

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