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Thread: LW 2020. 0.0.1 Environment light noisy

  1. #1
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    LW 2020. 0.0.1 Environment light noisy

    I've tried increasing light samples, increasing camera samples. Everything I try I have to increase a lot to get a clean enough image for animating. I have GI turned off, but Env. Light still noisy, the fibre fx has bad fireflies, I like the Environment light as it brings more realism with an hdri map. Anyone got any tips for cleaner renders with faster times. At the moment it's taking around 5mins to get a passable image but not really good on the hair. Thanks in advance.

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    LightWave documentation BeeVee's Avatar
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    How many zeroes?! 2020.0.0.0.0.0.0.0.0.0.0.0.1? What's in your HDR, how big is it, does it have small hotspots?

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    Lol sorry that was meant to be 2020.01. Dunno what happened there. I'll check what size it is, but tried other hdri's and still noisy. Don't mind cranking it up for stills but for animation it's just too long rendering, so gone back to normal lights without environment light. Will keep tinkering.

  4. #4
    Do you have principled glossy material(s) which has 50+ percent roughness in your scene ? If yes, then try lower roughness like 30% or so.
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    Quote Originally Posted by Lewis View Post
    Do you have principled glossy material(s) which has 50+ percent roughness in your scene ? If yes, then try lower roughness like 30% or so.
    I'll double check and try that thanks.

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    Super Member Kryslin's Avatar
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    You can also enable despike; I usually have it set to .2 instead of the default.

    That should take care of most of the fireflies. I use an environment light with FFX and don't see any fireflies.

    To reduce the amount of noise using FFX, don't use solid black (0,0,0) as a shadow color. I use (.06,.05,..06). And don't forget the shading overrides - It seems that all the hair shaders are now classified as dielectric materials, which means you can override the refraction samples for it to something higher( like 3-4) on a per material basis.
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    Quote Originally Posted by Kryslin View Post
    You can also enable despike; I usually have it set to .2 instead of the default.

    That should take care of most of the fireflies. I use an environment light with FFX and don't see any fireflies.

    To reduce the amount of noise using FFX, don't use solid black (0,0,0) as a shadow color. I use (.06,.05,..06). And don't forget the shading overrides - It seems that all the hair shaders are now classified as dielectric materials, which means you can override the refraction samples for it to something higher( like 3-4) on a per material basis.
    Great tips, will definitely try that thanks.

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    Tried the tips above, but still have fireflies/noise on the hair. Just cannot get rid of it unless I were to crank camera samples to silly amounts. Will have to keep tinkering but running out of ideas now. Maybe it's because the characters hair is black.

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    Super Member Kryslin's Avatar
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    can you post the scene, or a simplified version of it that exhibits the problem?
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    I just realised I set despike wrong. Was looking on my phone and thought you wrote 2, but in fact it's point 2. Will try that. I notice some hair surfaces render better than others. I think there's about 3 different surfaces for hair.

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