I am working on a scene in blender related to Minecraft but for some reason my render image have small yellow and red spots sprinkled which are barely noticeable , is their a way to fix it. it might be a problem with cycles as it works fine with eevee.
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$\begingroup$ You can put your comment as part of the question. Of course it would help to see your image or a small portion with the grains or [noise]. You can reduce your image using a lower resolution output .. potentially. You might use free GIMP to clip your image. Have you researched [noise] or looked for the denoising check box? You may wish to show that in your question as part of a your Blender screen capture. $\endgroup$– atomicbezierslingerDec 13, 2020 at 7:30
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$\begingroup$ ok ill try lowering the resolution $\endgroup$– new userDec 13, 2020 at 7:35
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$\begingroup$ but iam not sure about the noise modifier. $\endgroup$– new userDec 13, 2020 at 7:36
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$\begingroup$ GIMP can edit your OpenEXR or PNG. You might try searching here at BSE .... How do I get rid of noise in cycles render or something like that. $\endgroup$– atomicbezierslingerDec 13, 2020 at 7:36
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$\begingroup$ ok thanks for the help $\endgroup$– new userDec 13, 2020 at 7:40
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1 Answer
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These are often referred to as "fireflies," and they're a common artifact in Cycles renders. Because Cycles is a path tracing engine which uses pseudo-randomness, some samples will find light sources and illuminate pixels that would otherwise be fairly dim.
You can either increase your number of samples (although it may take a very large number and long render time to eliminate them entirely), or you can take a look at Blender's relatively new built-in denoising options.
