Questions tagged [noise-reduction]

Questions considering the process of reduction of noise in final renders and/or texture baking.

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4
votes
2answers
5k views

Fireflies / noise on glossy material

I have a bunch of glossy balloons lit by a sun lamp and the world (Background Sky Texture). This is the nodes setup. After rendering I have the image below. When we look at a more detailed level we ...
6
votes
3answers
3k views

Why do fireflies increase with number of samples when using a hdri light source?

I have a plane with a simple diffuse material. I use an HDR light source from Greg Zaal. The world setup is as simple as this: When I preview, the noise seems to increase with the number of samples. ...
4
votes
1answer
4k views

How to reduce noise in really dark scene

So I've been working on this one scene for a while now and I just can't get the look that I want. It is supposed to be a bar and therefore pretty dark. For some reason, nothing I do seems to reduce ...
6
votes
2answers
3k views

Shadow-catcher stays noisy even with Denoising - also very dark

I am facing some issues with the shadow-catcher and denoiser in Blender 2.79. Denoising doesn't seem to have any effect on shadow catcher shadow. If I turn off shadow catcher on ground plane the ...
3
votes
0answers
303 views

Noise reduction in tight area in cycles

I have an object like this. It's basically an icosphere with holes, which I got by selecting all faces, Select Menu > Checker Deselect and then S + 0. The problem starts when I try to render it in ...
1
vote
1answer
63 views

Donut glass cup render has too many grains and speckles + denoiser come out distorted, shadow is also too opaque. What settings may I try out?

I feel I am nearing completion of the tutorial but am still having gaps in knowledge on how to render light properly. 2.92.0 blender file: https://pasteall.org/blend/6474d6f8bd5f4b1abbabaa41478e7e6a ...
3
votes
1answer
4k views

Noise in Cycles Interior Scene

I am fairly new to blender and wanted to make something in Cycles, with the same kind of white lighting/style as this: I modeled a little train station and rendered it in Cycles. It was incredibly ...
7
votes
3answers
4k views

Noisy depth of field

So I tried one of the Blender Guru tutorials, which ends with depth of field settings. The blurred lights are however too noisy: Which is strange, because when I turn DOF off, the distant droplets ...
3
votes
1answer
4k views

Volumetric cloud render noise in Cycles

I'm rendering volumetric clouds using Procedural cycles Clouds shader. I'm getting a good result, but with a strange noise (middle bottom screen): It's about 180 passes. As you can see everything is ...
2
votes
1answer
369 views

Why do I have 'glitched' areas in my render after enabling denoising? [duplicate]

I am a newbie to blender and i found a 'Denoiser' option and decided to use it. I found out its function but it seems to create these 'glitched' areas in one of my renders. What are they and how do i ...
1
vote
1answer
4k views

Blender 2.8 eevee rendering noise

I am seeing a lot of noise when using eevee to render. Attached is a mesh where you will see the noise is very heavy at the bottom of the iconosphere. This noise is only seen with metallic materials. ...