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How to speed up lux renders

witcherask_a3dd58a1c6witcherask_a3dd58a1c6 Posts: 194
edited December 1969 in Daz Studio Discussion

How do i speed up lux renders
Whats best way to noise
Can i use cartoon shaders with lux renders?

Comments

  • Herald of FireHerald of Fire Posts: 3,504
    edited July 2013

    This is a question which is asked quite frequently, and the problem with giving a straight answer is that there are no straight answers. I can tell you that the noise clears up when given more time to render, but how quickly it does can vary quite a bit depending on a number of factors:

    - How many lights are in the scene?
    - How easy is it for the camera to 'find' the light sources?
    - Do you have a lot of reflections and shiny surfaces?
    - Are you using a lot of very distant objects such as skydomes?
    - Are you using volumetrics such as SSS or caustics?

    Without knowing the above, it's very difficult to guess what could cause a scene to render slower than others. If you haven't already, you should check out one of the Luxus discussion thread. Whether you use Reality or Luxus, a lot of the tips there apply to both since they use the same render engine ultimately. It's well worth your time to learn about the engine to get the most out of your renders.

    If you have more specific queries though, please feel free to ask and I shall answer as best I am able.

    Post edited by Herald of Fire on
  • witcherask_a3dd58a1c6witcherask_a3dd58a1c6 Posts: 194
    edited December 1969

    well there are 5 lights in scene
    2chars
    well i dont have any reflective surfaces but all my materials was glossy
    No skydomes
    No volumetrics or caustics
    20hrs in render and still lots of noise

  • Herald of FireHerald of Fire Posts: 3,504
    edited July 2013

    If I had to guess then light count and reflectivity would be my guess as to why your scene is taking a while to clear up. It's also possible that despite the number of lights in the scene, the camera itself doesn't have enough of it to work with and the light is struggling to find the virtual aperture.

    Glossy surfaces reflect light by nature. A glossy surface with a low roughness value will act like a mirror, keeping light rays bouncing around the scene instead of letting them be destroyed. As Lux is a largely unbiased engine (though it does have a little bias) it calculates these rays as if they're important, even when they're not, which leads to wasting CPU time on parts of the scene which you're less interested in or on parts which won't even appear in the final image.

    Post edited by Herald of Fire on
  • MattymanxMattymanx Posts: 6,943
    edited July 2013

    Can you please post a screen shot of your scene as it looks in DS plus a copy of your render.

    Are you using Luxus or Reality to transfer the scene to Lux Render?


    Thank you

    Post edited by Mattymanx on
  • XoechZXoechZ Posts: 1,102
    edited December 1969

    One thing that speeds up any kinds of renders is of course a modern, fast and powerful CPU and enough RAM.

  • witcherask_a3dd58a1c6witcherask_a3dd58a1c6 Posts: 194
    edited December 1969

    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRRLimbsM.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRRLimbsB.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/Danielle/Danielle-limbs-work.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRRInMouthM.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRRInMouthB.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/Danielle/Danielle-teeth.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/Danielle/Danielle-teethG.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRREyesM.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/M4/M4JeremyRREyesB.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Reading texture map: won-Resources/textures/Eyes/Danielle-eyes-01-.png
    [LuxRays::SDL] RGB texture map size: 256x256 (768Kbytes)
    [LuxRays::SDL] Alpha map won-Resources/textures/Danielle/Danielle-lashes.png is for a materials without texture. A black texture has been created for support!
    [LuxRays::SDL] Creating blank texture from: won-Resources/textures/Danielle/Danielle-lashes.png
    [LuxRays::SDL] Initializing the texture with 1, 1, 1 for 65536 pixels
    [LuxRays::SDL] AddTexMap: won-Resources/textures/Danielle/Danielle-lashes.png
    [LuxRays::SDL] Reading texture map:
    [SLG] RUNTIME ERROR: Unknown image file format:

    Getting this error when i use SLG rendering. Whats wrong how to fix it

  • SzarkSzark Posts: 10,634
    edited December 1969

    omgwtfbbgxy said:
    well there are 5 lights in scene
    2chars
    well i dont have any reflective surfaces but all my materials was glossy
    No skydomes
    No volumetrics or caustics
    20hrs in render and still lots of noise
    depending on your computer 20 hours is so not long enough. Think in Days not Hours and you might get somewhere.
  • witcherask_a3dd58a1c6witcherask_a3dd58a1c6 Posts: 194
    edited December 1969

    I have a i5 , 8 GB ram and GTX 560 TI.
    I think computer is good enough.

  • SzarkSzark Posts: 10,634
    edited December 1969

    Well yeah with that computer 20 hours is not long enough so again think in Days.

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