Do you have any idea what is causing these artifacts on my cycles render?
I'm using a sun light source to illuminate the scene. 128 samples.
I've pasted a screenshot of the material that the artifacts are happening on
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$\begingroup$ Denoising will introduce new artifacts, and is certainly not a substitute for a decent number of samples. Read: How to properly denoise renderings? $\endgroup$– user1853Feb 21, 2019 at 16:37
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I solved the problem by raising the samples count to 400
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$\begingroup$ Looks as if you were using denoising on a extremely low sample count. $\endgroup$– ChrisFeb 21, 2019 at 14:19
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$\begingroup$ I did use denoising, so it could definitely have been that. I have just never seen it before and I always use denoising. Even with low sample count $\endgroup$– KrellzarFeb 21, 2019 at 14:23
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$\begingroup$ The default denoiser of Blender has some issues especially with monotone and flat surfaces, which your case does fit perfectly. The results are those clouds that form. $\endgroup$– ChrisFeb 21, 2019 at 14:32