Blender samples — the higher the better (less noise). Increased samples lead to a cleaner image, but longer render times. This is how to gain insight into the appropriate number of samples for your project.
What Are Samples?
Add sample rate, which is how many rays to trace for light at a pixel in Cycles. Increasing the number of samples results in more precise lighting and shading, however, at the expense of longer render times.
How to Select Best Sample Size
Low Samples for Test Renders: Set samples to a low value (64 or 128) for quick test renders. This will let you be able to get a sense of how the scene looks as a whole without having to wait on a long render.
Medium Samples for Final Renders
On most final renders, you will want to set the samples between 500 and 1000 for a solid quality-to-render-time ratio. This list is pretty good for static images and not too complicated animations.
High Samples for High-Fidelity Renders: In case of photorealistic renders, or if your scene consists lots of details, the samples can be increased to thousand and two. This option will greatly increase the render times, but it will produce a way cleaner image with far less noise.
Denoising-based sample composition: Denoising gives you clean results from less sample. It’s a feature that makes sense in a production environment, like for animations, where you spend forever rendering frames but you’re able to cut down on times using denoising at lower sample rates.
Changing the number of samples allows you to find that fine line between quicker render times and image quality, depending on your specific project.
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