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Questions tagged [noise-reduction]

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

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3 votes
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How can I render a ball with equirectangular camera?

Firstly, I'm a first time user for Blender. I want a equirectangular image so that I can create a texture to use on a sphere object on my Unity project. I'm searching and trying for hours. Here what I ...
Halil Nebioğlu's user avatar
3 votes
0 answers
321 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 ...
Highstaker's user avatar
2 votes
0 answers
198 views

Ambient occlusion causes serious noises in EEVEE

My EEVEE render looks okay with Ambient Occlusion off: But when I turn it on: The noise gets really bad: No matter how many Samples I set (it's almost as noisy in 16 samples as 1600 samples). Is ...
Lai Yu-Hsuan's user avatar
  • 2,012
2 votes
0 answers
90 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 ...
Joshua Diem's user avatar
2 votes
0 answers
134 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 ...
blue's user avatar
  • 1,287
2 votes
0 answers
416 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 ...
skalli's user avatar
  • 21
2 votes
0 answers
235 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 ...
Guido's user avatar
  • 51
2 votes
0 answers
147 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 ...
Booth's user avatar
  • 665
1 vote
0 answers
221 views

Why is my render blotchy and how do I get rid of it?

So I have this scene I'm trying to render and I noticed no matter how many samples I use, I can't get rid of the blotches on it. I used 1200 samples in this render. I'm using cycles. This took 4-ish ...
Todahmoon's user avatar
  • 341
1 vote
0 answers
150 views

Combining low sample renders has more noise than one large render

I am trying to create a script, that would allow me to merge multiple images, rendered with different seeds and different sample amounts into one image with a higher sample amount. The script is using ...
Hoodrobinrs's user avatar
1 vote
0 answers
204 views

Weird noise-like textures on roughness textured surface? (Cycle render)

So I have this metal object that has roughness textures on it. It looks okay on the viewport. But when I render it somehow there are some noise textures on it. The noise especially is on the shaded ...
ariish44's user avatar
1 vote
1 answer
105 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 ...
Svisha's user avatar
  • 65
1 vote
0 answers
818 views

Speed up Intel denoise

Currently I'm rendering on cpu, because at the time of writing it's faster for me (tested it a few times). I know this is kind of bad and I should get a better gpu, but well, currently it's not ...
jona's user avatar
  • 277
1 vote
0 answers
613 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 ...
Alfonso Torres's user avatar
1 vote
0 answers
177 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 ...
Jonas's user avatar
  • 23
1 vote
0 answers
113 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 ...
Mike Metcalf's user avatar
  • 1,295
1 vote
0 answers
496 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 ...
Scott Krehbiel's user avatar
0 votes
0 answers
33 views

Why is the background so full of noise?

I rendered this animation of a coffee mug with a smoke simulation to create the hot steam but the background is almost distorting like with heat distortion. I do use depth of field and the focus ...
Arceus's user avatar
  • 67
0 votes
1 answer
118 views

Noisy .png after rendering Gloss passes

I'm using Cycles as my render engine, on the latest version of Blender 3.5.1 In compositor, I used a set of nodes to seperate the highlights (glossy) from the rest in order to save it seperately in a ....
art_stuff's user avatar
0 votes
0 answers
100 views

Cycles alpha background, noise on edges

I am new to blender and i want to render some images with transparent background. This image is rendered with cycles and the shadows are generated on a plane with Shadow catcher. The problem is that ...
Alex Cristian R's user avatar
0 votes
0 answers
86 views

Is there a way to isolate single objects for more Cycles render samples?

I'm animating a large scene, i.e., with many objects and light sources, with Cycles and struggling to solve noise issues. It's an outdoor scene with a real world twilight HDR sky and the darkness of ...
WilburPost's user avatar
  • 1,067
0 votes
1 answer
865 views

Eevee rendering noise with MToon transparent material

Blender 3.1.2 I have a VRM model I've imported into Blender. Both in the viewfinder and rendering view the glasses of the model have distinct noise. It is not a texture issue, the texture file does ...
MegamiRissa's user avatar
0 votes
0 answers
38 views

Can we change Noise seed per sample in Cycles?

In cycles, I have noticed that instead of taking 1000 samples, we can take just 10 renders of 50 samples each with different noise seed and average them externally, the noise goes down A LOT. So, is ...
CoolCoder's user avatar
  • 626
0 votes
0 answers
99 views

texture baking artifacts

im having issues with baking a texture via blender. im only using a bsdf node with white and the sun as a light source. somehow it keeps coming up with these artifacts instead of being smooth with ...
Carter the artists's user avatar
0 votes
0 answers
43 views

Have strange noise in compositor in Cycles (Cycles X too)

I make render of smoke in cycles in blender 3.0. Render location in eevee and mix it in copmositor. BUT in render a have no noise and have it in copositor. How I can fix it? Files in attach - ...
Simon Laskin's user avatar
0 votes
0 answers
233 views

Noise in the animation render

So I did a render for a small animation that I need to put on a website ( needs to be small in size to load fast ). I used 500 samples in cycles with Denoise in this render but it seems to get some ...
Frederico Jesus's user avatar
0 votes
0 answers
82 views

Scene is noisy and the noise barely changes from 750+ samples

I have created this blockout of a hobbit hole but when i try to render it it's very slow and quite noisy(denoising used) even without volumetrics. I would just crank up the samples to solve this but ...
Matěj Chalupa's user avatar
0 votes
0 answers
175 views

White Noise after Rendered Scene

When I render, white like bricks come up in my scene and start to affect the sand textures. I've researched I thought it was a noise particle from using something transparent like water but the noise ...
OGee Sama's user avatar
0 votes
0 answers
221 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'...
Rock's user avatar
  • 153
0 votes
0 answers
33 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 ...
Charlie Hayward's user avatar
0 votes
0 answers
31 views

How do i remove these splotches from my rendered image?

I am a beginner that just did the doughnut tutorial
Beginner's user avatar
0 votes
0 answers
435 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=...
Zakenmaru's user avatar
0 votes
0 answers
272 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
Harshan Alweera's user avatar
0 votes
0 answers
1k 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 ...
Majenko's user avatar
  • 185
0 votes
0 answers
607 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 ...
Noam Peled's user avatar
0 votes
0 answers
76 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 ...
Dharana Weerasinghe's user avatar
0 votes
0 answers
125 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 ...
Yasef's user avatar
  • 73
0 votes
0 answers
473 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 ...
altheconda's user avatar
0 votes
0 answers
73 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 ...
rafaelluizeu's user avatar
0 votes
0 answers
378 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 ...
schustudrai's user avatar
0 votes
0 answers
686 views

Why is my Cycles rendering grainy?

I think the picture speaks a thousand words:
user23114's user avatar
0 votes
2 answers
174 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 ...
Santiago Steib's user avatar