weird yellow and red grains on my renders

Question

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.

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. — atomicbezierslinger, Dec 13 '20 at 07:30
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. — atomicbezierslinger, Dec 13 '20 at 07:36
To the side of this page with the label [Related] are hopefully your same or similar question. So you may see some [hopefully not so] elaborate answer there. One person called them fireflies — atomicbezierslinger, Dec 13 '20 at 07:42
https://blender.stackexchange.com/questions/4980/how-to-avoid-noisy-renders-in-cycles — Duarte Farrajota Ramos, Dec 13 '20 at 13:38

score 1 · Answer 1 · answered Dec 13 '20 at 10:55

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.

weird yellow and red grains on my renders

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