Questions tagged [cycles-render-engine]

Cycles is a ray tracing render engine that can be used to achieve photo realistic results in Blender. It was introduced officially in 2.61. Use this tag for any Cycles related posts.

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Cause of tiled artifacts in render?

Following image is my first attempt on rendering using cycles. Unfortunately I get some artifacts and I have no clue why. It doesn't show up like this in the viewport, only when rendered. Q: How to ...
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Render viewport preview keeps resetting

I have looked around a lot with many different keywords but can't seem to find anyone having the same problem. I am basically working on an interior kitchen scene and I am trying to preview the render ...
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Command line script renders without shaders

I'm trying to render a simple scene using the Python API. I've created a red cube in blender and want to output it using the Python API. The only things I've changed from the default new file is the ...
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Visible Light Rays in Mirror Reflection

I know this is a very common issue, so I will come out and say that I am already aware that I can turn off the visible light source in its properties so it cannot be seen in a glossy reflection. I do ...
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2.8 Render preview crash [closed]

Whenever I switch to rendered view, blender crashes immediately. I went to look at my system preferences and I got a screen saying I had no compatible GPU's available for path tracing. Does anyone ...
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Physics fluid stimulation is not showing rendering tab or being rendered in one particular project

I am in a middle of project. I did some basic flame kind of Stimulation for my project. I can see that effect in object mode and material mode but not in rendered mode. So I created a new project. And ...
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Cycles glow in an animation?

I’ve gone through tutorials on making an object glow in cycles but these seem to be geared towards saving a single image in viewer mode. Is it possible to get cycles glow with the glare node in a ...
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Shadow catcher not working

I was trying to make a camera tracking project for learning and everything was good until i encountered a problem , the plane was supposed to be catching shadow of the light on my background ,but ...
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Shrink-wrap transparent label - render artifacts

What am I doing wrong, please? I applied this "H" label to the jar and get this. It's image plane shrink-wrap-ed around the jar. See my settings down. Even when I move label a bit from the ...
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Why is my GPU rendering so slowly?

I have an AMD Radeon RX580 graphics card with an i7-7700K CPU. When I render an image - regardless of tile size - both the graphics card and the CPU render it quite slowly, but the GPU much slower. ...
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Can you use Cuda from GPUs of different generations?

Is Blender able to receive any benefit from using my 2060 RTX and my old 660 Ti since they both have Cuda cores. They're have different speeds and such but would they be able to take advantage when ...
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Blender CUDA Flatpack

OS: Manjaro KDE GPU: Nvidia GTX 1650 I tried using blender from the official repos, for some reason certain features dint work. I installed blender from Flatpak, everything works fine exept it does ...
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How do I get rid of these un-calculated parts in Cell Fracture?

I've tried to recalculate normals, and also tried a solidify modifier. But, cannot seem to get cell fracture to work without having pieces that aren't calculated, meaning, unfinished pieces just ...
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Where is the volume step size option in Blender 2.83?

Here is a picture of what I see in the volumes dropdown: I tried going through all of the dropdowns in the render settings but still, no such luck.
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Excessive refraction at glancing angles with glass and/or fresnel nodes?

Making physically-based glass without weird hacks seems really hard with cycles. Does anybody have any tips they could share with me to solve this issue? I have read every single thread available on ...
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GPU Compute in Cycles Fails to Render When Using CUDA and GTX 1660 Ti

GPU Compute used to work fine but has only functioned for a few seconds at most in the current blender versions. Is there a workaround for this issue? Nvidia Drivers have been updated to the latest ...
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Fluid Domain Explosions acting strange with Motion Blur

V.2.830 EVGA GTX 1070 Intel i7 4.7hz Win 10 Cycles Render Can anyone shed any light on this. I have added motion blur to the scene. There is no camera motion at all. No animations on anything other ...
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Minecraft character hair glitch!

I always see these hair glitches whenever I append a Minecraft character rig. This skin has hair in the back also on the sides! But Because of this glitch I can't see the full hair beside it glitches ...
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RX 590 Render Problem, Please help [duplicate]

i have problem. I Dont know why, but i cant render anything in "CUDA" and "OptiX" but OpenCL work fine. And i cant use Cykle render beacuse it's very laggy. I Have newest version ...
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43 views

RX 590 IN Blender and Cycles Render

I don't know why, but I cant render anything in CUDA and OptiX but OpenCL work fine. I cant use Cycles render because it's very laggy. I have newest version of Blender and an RX 590 Red Dragon 8gb. ...
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Bloom in Cycles for animation or ring transparency in Evee?

I am making a space scene and I am having a problem with not being able to solve either one of these problems. Cycles renders the rings around my planet properly by making the space between the ring ...
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Blender 2.83 GPU render slows compared to CPU

I am doing animations for over 3 years and i never came across the scenario that GPU render slower than CPU. I m currently rendering a scene and the same scene is being rendered by CPU in 9 minutes ...
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Fire not showing up when I make the background transparent [duplicate]

I cant figure out why the fire disappears when I switch to a transparent background with cycles.
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Help creating anime style aura using blender Internal (2.79)

This is about to be a long shot. But is anyone able to translate this effect from blender Cycles (2.8+) to blender internal render engine (2.79)? The place i get lost the most is figuring out the ...
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Background doesn't render transparently despite checking Film-->Transparent; RGBA settings (cycles, v2.83)

I'm trying to render an object with a transparent background. As per the instructions I've found online, I have "Transparent" checked in Render Properties, RBGA/PNG selected in Output ...
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Using Cycles renderer the reflections look good in viewport but not in in the render, why is this happening?

Im using Cycles renderer and there is no reflection when I render the image I ve been searching for solutions but I couldnt find any, Im using Blender 2.83 This is how it looks in the viewport This ...
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1answer
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How to bake with Blender 2.82 and keep shading information?

I am having issues baking in blender. I'm new to blender so I don't know what I am doing wrong. I have the UV mesh unwrapped and a blank image-texture selected for it to bake to. But whenever I bake ...
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Instead of glass, a different material is rendered

Hello hope you can help me. I'm working on an archviz scene and for some reason glass material is not rendering. In render preview it does work but on final rendering it doesn`t. Does anyone has any ...
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How can I accomplish, that the surface of the Ocean modifier isn't shown on the inside of a drifting transparent bottle?

I'm trying to make an animation that shows multiple transparent bottles(which I used the solidify modifier on), that are swimming in the Sea(a normal ocean modifier surface). On the inside of the ...
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1answer
20 views

Object radiance value buffer

The "wiki" states that an objects radiance value is written out into the render float buffer. Where in the source code is this buffer and how do I access it (variable name?)
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Hair particles don't render in cycles engine

I changed my render engine from eevee to cycles, before it rendered perfectly fine, but now one of the hair particle groups doesn't appear in the rendering, which is especially weird because all of ...
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1answer
25 views

Alpha channels in cycles canceling out each other

I have two images with alpha channels that overlay each other. In Eeevee it works fine but in cycles, the front image's alpha channel blocks out the image behind it. Is this something that can be ...
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1answer
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Avoid rendering hidden objects (blender 2.8)

Is there a way to stop blender from rendering hidden objects (that do not show in the rendered view)?
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Render profiling in blender 2.8

Sometimes, when I add a shader node render times for a single object are reasonable but, whenever I try to render sets of said object (e.g. tree --> forest) rendering takes up days or even weeks ...
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1answer
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Blender stopped rendering with cycles

I'm following the donut tutorial and got to part 6, everything was going well and I was switching back and forth between eevee and cycles just fine until... it no longer will render cycles in the ...
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1answer
29 views

How do I get rid of the pixelation that occurs when I render on Cycles?

The pixelation gets worse if I rotate my view around the object in question. I've tried increasing the viewport frames, changing the resolution, and playing around with the quality.
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How to reproduce the edge lighting in the promo art for Minecraft?

So I work for an animation team, and we're trying to reproduce the edge lighting that is present in the promotional art for Minecraft, we haven't had any luck so far and I decided to resort to stack ...
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megascans asset not smooting correctly in render but does in look dev

So I just started using blender this week and today I imported a megascans asset to learn more about rendering. When I am in look dev the asset looks normal and i dont see any smoothing errors. When i ...
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how to write a custom projection type?

Is it possible to create a lens shader with EEVEE/Cycles ? I'd like to have the control over the camera position and the ray direction per sample. This allows to simulate various conventional lens ...
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1answer
35 views

Why is my rendered image distorted?

When I animate everything looks normal here: But then I render it with F12 it looks like this: Why is that? I'm a beginner and not a native-english-speaker. So sorry if I get a bit confused.
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Why is RTX 2080 is slower to render than laptop with EEVEE?

I just changed my laptop Macbook Pro with a Radeon 460 pro 4gb, 16goRam to a new computer with a RTX 2080 Ti 11gb with a intel i9 9000 CPU, 16go Ram With Cycles i have no problem to speed up my ...
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Cycles renders GlassBSDF opaque [duplicate]

I am trying to make a lens effect in Blender. I created the material for the lens with the Glass BSDF shader and connected it directly to the material output, and changed my render engine to Cycles. ...
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21 views

I'm getting these weird inaccurate, smeared reflections. What am I doing wrong?

I'm using cyces. The background is an Environmental Texture.
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3answers
41 views

Weird shadow behavior on mesh

I have some weird shadows on my objects. More specific it changes when the angle of view has changed. You can see in the first image the middle cushion is lightened and in the second image is darkened....
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1answer
35 views

How come reflections are still visible using 0 bounces?

After creating an animation, I decided to try and optimize my render settings so I could get the final result much faster. (I am using cycles) A lot of people advised me to lower the bounce count, so ...
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Distorted displacement on UV Sphere

So i'm following CGMatter's tutorial on procedural lava, but when I put the displacement on the sphere, the top is weirdly twisted, and also the rest of the displacement is pointed in one direction, ...
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1answer
908 views

God Rays through window pane: Cycles

I'm creating a scene for a project and I wanted to go for the god ray effect achieved by the lights passing through the window. I added a mesh onto which volume scatter node was added, but still, even ...
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16 views

Can Texture Painting Auto Update in Cycles?

Couldn't find an answer other than "use eevee" or this. I'm painting on a texture that is used in a background world node using cycles. Unfortunately, render preview doesn't render the ...
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A cuboid appears in the final render instead of window blinds [duplicate]

THE window blinds in my scene appear with a large cuboid covering it. This is only showing up in the render output. I tried making the window hole with a boolean modifier and without- but this cube ...
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Blender Project doesn't start rendering

I'm pretty used to blender, and I've never had any problem like this. I recently changed my workstation and now some projects aren't able to render. For example I have a project of a chair, with about ...

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