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Daz 4.8 Iray renderes still noisy and dots abound, screenshot provided with render details...

smtelephone_cb7254b03asmtelephone_cb7254b03a Posts: 35
edited December 1969 in New Users

Hello,, here is a render i just did over night, i think it might have taken 4 hours or somethig, not sure, i was sleeping. The imae looks pretty good, but it doesnt seem to be as complete and unnoisy as it should be. Can anyone look at my progressive rendering setting an tell me what I should tweak to get a more complete render? I am using a laptop with intel hd graphics, 8gb of ram so yeah its a tiny computer but iray does work! Thanks!

Screenshot_(32)_copy.jpg
1077 x 634 - 645K

Comments

  • jestmartjestmart Posts: 4,449
    edited December 1969

    If you didn't change the default setting for the IRay render engine the rendering will stop at which ever of the following comes first, 2 hrs or 5000 iterations or 95% convergence. If you don't have a fast processor and/or Nvidia graphics card 2 hrs may not be long enough for convergence to reach an acceptable percentage level.

  • smtelephone_cb7254b03asmtelephone_cb7254b03a Posts: 35
    edited April 2015

    Would 5000 iterations be enough to "finish" a 2560x1800 size image if I set the time to like 10 hours?

    I was wondering about the convergence percentage, do I want to push tthat over to 100% in order to get an image with less dots? What about rendering quality? do I want to raise that any higher than 1?

    Post edited by smtelephone_cb7254b03a on
  • Richard HaseltineRichard Haseltine Posts: 102,788
    edited December 1969

    How is your scene lit? is it open or enclosed? What are your tone mapping settings? If there isn't enough light, or if the light can't reach the area you are rendering, then the render will take longer to converge. If the scene is dimly lit and you don't adjust the tone mapping to compensate then the render will take longer to converge. A simple looking portrait render shouldn't take that long, I don't think your issue is the time/quality settings but the lighting or the tone mapping.

  • mjc1016mjc1016 Posts: 15,001
    edited December 1969

    Richard Haseltine said:
    I don't think your issue is the time/quality settings but the lighting or the tone mapping.

    Looks an awful lot like a picture taken on a phone from about 6 or 7 years ago.

    That screams to me lighting/tone mapping as opposed to not enough time. I've found that overall, not enough time to converge issues have a different look to them. Like the noise tends to be concentrated in certain areas, or there are a lot bright fireflies or other things along those lines...it looks a lot like the what it does after the first few iterations...but a bit more refined.

    Not enough light/wrong exposure (tone mapping)...a more uniform noise/cheap camera photo look.

    And that isn't just an Iray observation...it is similar in any PBR render I've seen/done.

  • smtelephone_cb7254b03asmtelephone_cb7254b03a Posts: 35
    edited December 1969

    Thanks for the observations! Tone mapping it seems like a lot to take in, anyone have a good tutorial for a new user? Don't worry I'll Google it too lol

  • Richard HaseltineRichard Haseltine Posts: 102,788
    edited December 1969

    http://docs.daz3d.com/doku.php/public/software/dazstudio/4/referenceguide/interface/panes/render_settings/engine/nvidia_iray/tone_mapping/start

  • vex3dvex3d Posts: 130
    edited December 1969

    Just want to add that it is possible to adjust your tone mapping settings DURING render so you can see the effect without canceling/restarting.

    On your render progress window, if you look on the left edge, there's a tiny handle you can click to pop up the render settings. You can adjust the progressive/filtering/tone mapping from here.

    With that said, I still haven't found a magical tone mapping setting that works for all light sets and skin tones. Definitely something that needs adjusting per render unless you like the default look. ( who does?! )

  • ShawnBoothShawnBooth Posts: 465
    vex3d said:

    Just want to add that it is possible to adjust your tone mapping settings DURING render so you can see the effect without canceling/restarting.

    On your render progress window, if you look on the left edge, there's a tiny handle you can click to pop up the render settings. You can adjust the progressive/filtering/tone mapping from here.

    With that said, I still haven't found a magical tone mapping setting that works for all light sets and skin tones. Definitely something that needs adjusting per render unless you like the default look. ( who does?! )

    Can we get a screEn shot of this handle?

  • FishtalesFishtales Posts: 6,162

    Could you post a screen shot of Tone Mapping, Environment and the camera (if you have one setup) settings.

  • prixatprixat Posts: 1,590
    ShawnBooth said:

    Can we get a screEn shot of this handle?

    There are a couple in this thread:

    http://www.daz3d.com/forums/discussion/comment/837965/#Comment_837965 ;

  • ShawnBoothShawnBooth Posts: 465
    prixat said:
    ShawnBooth said:

    Can we get a screEn shot of this handle?

    There are a couple in this thread:

    http://www.daz3d.com/forums/discussion/comment/837965/#Comment_837965 ;

    Thank you. Found it.

     

    Have a a render going, on 15 hours. I'm so happy with image, I'm willing to just let it go until it's finished. Then I tried adjusting ISO while rendering and it basically restarted the render?! Maybe I misunderstand the concept?

  • prixatprixat Posts: 1,590

    15 hours, ouch!

    The restart issue is a recent development, some things have begun to trigger a restart, I'm not sure which.

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