Small white dots with free Maxwell Render?
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Hi!
I get small white dots like dead pixels on the screen when I render with the free Maxwell Render! I have tried to change all kinds of settings, but I can't get rid of them!
I use physical sky with sun and I have set the SL settings for the rendering to 17!? Preciate some help to improve my renderings! Thanks!
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This could be alot of things -- a few of the more likely:
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materials with colors too intense -- for instance "white" is really 225 RGB (the white of a sheet of paper) rather than 255 RGB... which will definitely cause noise. I tend to keep saturation below 225 as well for colors.
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Using dielectrics (Glass, Water and SSS) will not only cause the render to slow down alot but the caustics will be difficult to resolve (or even practically impossible depending on the lighting situation). Typically for SSS I expect to render to at least SL 20-25... glass/water can be much higher. Best advice is to use AGS instead of Glass.
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Using emitters with the physical sun/sky can cause power disparity -- Maxwell is optimized to resolve the noise of most powerful emitters first... and the sun is much more powerful than any other emitter. But you should be avoiding emitters with the free plugin anyway.
Best,
Jason.
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Thanks for the reply! I have attached an image from a test render to show the white dots. I use plastic material and the blue color is RGB: 137 184 221 and the ground is grey. I'm not using any emitters. Any more tips how to come around this or is this what i get with the free version of Maxwell Render? Thanks!
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If you care to share the SketchUp file with me (by PM) I can take a look and see what I can do -- otherwise I'm just guessing.
Best,
Jason. -
The white dots are reflected caustics -- they will clear but will take longer in the free versions "draft" mode for FIRE. Here are a few comparison renders (all to SL 12).
!["Production" mode for FIRE](/uploads/imported_attachments/BaHX_chair_SL12.png ""Production" mode for FIRE")!["Draft" mode for FIRE](/uploads/imported_attachments/IzHc_chair_SL12_draft.png ""Draft" mode for FIRE")and as a slightly counter-intuitive work around I would reduce the roughness to 0 -- which causes the caustics to be less of an issue... as you see in this render (which will be the file I PM back to you).!["Draft" mode for FIRE with 0 roughness plastic](/uploads/imported_attachments/jY51_chair_SL12_draft2.png ""Draft" mode for FIRE with 0 roughness plastic")
Best,
Jason.
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