Questions tagged [noise-reduction]

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

27 questions with no upvoted or accepted answers
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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 ...
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31 views

Excess noise in cycles render and odd denoising results

I'm trying to do some renders of a dark room, but there's quite a bit of noise despite me setting it to 128 samples. When the denoiser kicks in, it fixes the noise but makes the scene look completely ...
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97 views

Why is this glass getting blown out?

Ok I have a lot of glass in my scene but these shards I have on the floor, regardless of denoising settings or otherwise, that do not appear clear but rather get blown out into white. Denoise ...
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340 views

Image rendered with GPU shows less noise than CPU

This is an issue (or feature?) I experience with the blender version 2.76b from the offical ubuntu 16.04 xenial xerus repository. I can't reproduce it with 2.78c or 2.76b build from the blender ...
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0answers
187 views

Glass issue, trasparent vs holdout shader

I have a problem with the transparency shader. I need to use it combined with the glossy one, mixing using a fresnel factor. Unfortunately I keep getting the same result...an annoying black area. ON ...
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124 views

How do I make lamps effect scene locally only to reduce noise?

I'm trying to achieve photorealistic renders with Image Based Lighting + lamps that should effect the scene locally - only the surfaces around them. In this particular case, the first render was made ...
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240 views

Cycles — Why are my renders so blurry?

My renders are coming out extremely blurry and weird looking, im still pretty new to blender and im not sure how to fix this issue, and whenever I put the samples to higher numbers like 5000 the ...
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138 views

My shadows using “blender render” are noisy?

Whenever I make a render in Blender, all my shadows are messed up. They aren't just black, they're black but have a lot of noise. I don't know how to explain it better, so I'll post a render where you ...
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103 views

Sampling difference between Cycles 2.74 to 2.78a?

On Friday, we setup six machines to act as our render farm for a short (3000 frame) animation. All machines were loaded from a single saved blend file on a network drive. Five were Windows machines ...
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403 views

Cycles outlier removal for hot pixels - would that make it “biased”?

Even with setting my sampling numbers pretty high (256 diffuse and glossy samples times 16 render passes with branched path tracing) I'm still getting the very hot pixels. I read that this is caused ...
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43 views

Very noisy indoor scene mystery

I'm working on a indoor scene in Cycles Blender 2.90 with the Nishita sky as light source coming trough the windows. For the glass material I used Blender Guru's glass hack, but I'm sure the glass isn'...
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26 views

How to get rid of this noise?

im making a 3D animation of two glass hands cracking, but as Im getting to the point of sorting the lighting for the scene my glass material is giving off a large rectangle of noise. Im using evee ...
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28 views

How do i remove these splotches from my rendered image?

I am a beginner that just did the doughnut tutorial
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44 views

Unexpected noise/pixels of render preview in Viewport Shading

I'm really new to Blender and started watching a playlist from Youtuber Blender Guru, the one about making a donut. Link is provided below to the specific video: https://www.youtube.com/watch?v=...
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24 views

Object shadows having lines doubled

The shadows of the objects seems to be doubling up and even when moving the object around it flickers. Eevee Cycles
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13 views

Some form of noise on my sculpture when animating the camera moving around it

New to sculpting, made some kind of monster with a bunch of geometry, in eevee it looks mostly fine. But in cycles it has the lighting I prefer. Only problem is when animating a camera moving around ...
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47 views

Weird noise in background

I've encountered this strange noise in viewport AND render, hopefuly it's visible in the image. Basically this dark grey / black noise that doesn't change over time (not ray-tracing it seems), it's ...
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70 views

Eevee is too noisy / how to reduce at same samples?

People have probably asked this already but I have not found the answer. I have a reflective title with reflective plane, and the noise created in eevee is very high, even if I increase the samples ...
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665 views

Glass causes noise?

I've been fighting with noise in my render. For draft renders I clamp the AO bounces in simplify, which clobbers the noise, but also the shadows. And I don't like that. So for a final render I want to ...
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174 views

How to fix noise in a face mesh

I've created a head surface out of an MRI scan. Due to noises in the scan, some parts of the surface are noisy, mostly around the chin: Any idea how I can fix that? I'm trying different smoothing ...
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47 views

Noisy Animation

I'm new to Blender. I just animated a waterwheel but the water seems very noisy and grainy. Can anyone help me to sort this out ? I rendered this with Cycle's rendering engine. I don't have a GPU in ...
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97 views

Different number of samples for different parts of a render

Is there any way to use different number of samples in different parts of the scene? I'd like to have higher number of samples only where the glass material is but lower on the rest because I dont ...
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330 views

Cant remove fireflies around emission object (volume scatter)

Ive tried everything turning off caustics, ive turned on simplify, denoising is on, multiple importance is on, increased transparency, filter glossy all the way up to 10 (although there isnt glossy ...
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69 views

I always get some noise in my images made with cycles

There are also another problems with this image, but the noise I get in all my renders, I don't know how to solve this, could you help me. My renders also takes too long to render, even if it is a ...
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299 views

Noise in a render with just emission

In my render as seen is lots of noise in the background. But I only am using emission and transparent shaders (transparent at pure white). The noise only is visible in the final render, not if render ...
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627 views

Why is my Cycles rendering grainy?

I think the picture speaks a thousand words:
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2answers
159 views

Is it possible to have more fireflies at the same time I use more samples?

I am referring to the white dots that appear in glossy objects. I moved a little the metal carpentry for the second image, and I got less noise in the horizontal ones which are on the top, but for ...