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Iray preview is better that iray render?

juanjoharojuanjoharo Posts: 92
in Daz Studio Discussion

I don't know if its my mind but if i use the iray preview and left scene somo minutes te result is better that a render of several hours... at least there is no firefly artifacts. Even rendering at 10 hours, i can't totally get rid of the artifacts and grain...

 

 

Comments

  • Richard HaseltineRichard Haseltine Posts: 102,301

    The preview has separate settings from the render (Draw Settings control the preview, Render Settings control the render) and also doesn't support some features. One or both of those might account for the dfference.

  • ParallaxCreatesParallaxCreates Posts: 468
    Juanjo Haro said:

    I don't know if its my mind but if i use the iray preview and left scene somo minutes te result is better that a render of several hours... at least there is no firefly artifacts. Even rendering at 10 hours, i can't totally get rid of the artifacts and grain...

     

     

    You also need to take into consideration that the iray preview window is restricted to whatever dimensions that window is, thus yeilding quicker "clearer" "renders" as those dimensions are less taxing on your system being there are less pixels. Also do note, the bigger the dimensions you set for your "final render" to be the longer it will take and the more pixels there are thus resulting in more noise than that of your preview window. As Richard stated, the preview is also simplified for the purposes of being a preview. No one wants to wait the same amount of time that a final render takes for a preview so something is being sacrificed to achieve those quicker results and in most cases that's why the preview "looks better'.

     

     

  • juanjoharojuanjoharo Posts: 92

    Yeah, I understand that but why after more than 10 hours the render has this noise aspect? I can't find a way to remove it...

  • PaintboxPaintbox Posts: 1,633

    Use the denoiser, it works wonders to get rid of it.

  • ParallaxCreatesParallaxCreates Posts: 468
    edited March 2020
    Juanjo Haro said:

    Yeah, I understand that but why after more than 10 hours the render has this noise aspect? I can't find a way to remove it...

    This is a well traveled topic on the roads of these forums, there are numerous threads regarding noise. I can help walk for you a bit but really it's up to you to weave through the info found on these forums and see what is applicable for your scene on a case by case basis (use the search function).

    1) Lighting, how much of it? Is there very little or too much? Either or can produce noise.

    2)  Reflective surfaces, gloss, specular, refractive and so forth are also culprits regarding the presence of noise. Too much of any those and you will have alot of noise.

    3) Your hardware, how many cudas do you have? VRAM? Ram? How big is the scene vs the actual size your hardware can handle? You can't have a hamster push a boulder up a hill.

    As I stated, there is alot of information on the forums regarding this topic. We can walk a little bit for your but you need to continue the rest for your own sake. You know what you have going in your scene. take that and compare it to what you read in the many "noise" related topics and see what works for you.

    Like Paintbox mentioned, denoiser helps. But it won't correct a poorly lit or set up scene for you.

    Post edited by ParallaxCreates on
  • ggrancharovggrancharov Posts: 39

    Make sure you are rendering "Photoreal" e.g. have that selected, thats 99% the reson of your issue. 

  • juanjoharojuanjoharo Posts: 92

    Thanks for help, guys. I will try waht you said and see how it works... :)

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