The cycles render is a pseudo-random path tracer, so the less samples are taken the higher the random noise. Increasing the samples and some other tweaking redu

The cycles render is a pseudo-random path tracer, so the less samples are taken the higher the random noise. Increasing the samples and some other tweaking reduces the noise significantly, but also takes much more time. Denoising the rendered image can produce better visual IQ for less render time. See https://docs.blender.org/manual/de/dev/render/cycles/optimizations/reducing_noise.html https://docs.blender.org/manual/de/dev/render/cycles/optimiz...