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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27 votes
11 answers
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Why does my object not show up?

This is meant to solve this problem once and for all. What is every reason an object isn't showing up in a render or viewport in when using the cycles render engine?
JakeD's user avatar
  • 8,377
86 votes
9 answers
120k views

How to avoid noisy renders in Cycles?

I know that this question is a bit old or maybe overdone, but I'm running the latest edition of Blender and when I use the Cycles engine I get really fuzzy results and I can't find a simple, non-...
person27's user avatar
  • 1,297
27 votes
2 answers
37k views

Add a transparent image on top of a material [duplicate]

I'm designing this animal-type creature, and want to add a transparent .png image to its face with the face features (object has a subsurf). On the left is the image with the features, on the right is ...
MicroMachine's user avatar
  • 4,601
38 votes
2 answers
195k views

How do I bake a texture using Cycles bake

I created a interior scene and i don't know how to bake a texture using cycles bake.
Sachin Vani's user avatar
121 votes
2 answers
43k views

Render with a wider dynamic range in cycles to produce photorealistic looking images

To get images that seem more photorealistic, not only a much wider Dynamic Range is needed, but also having the color information desaturate towards white as it would happen in an overexposed ...
user avatar
45 votes
10 answers
43k views

How to reduce fireflies in Cycles?

I often use Cycles' built in Glass BSDF shader to achieve realistic refraction effects, but in many cases, it seems that Cycles' glass caustics creates an unfortunately large number of fireflies (...
Gwen's user avatar
  • 11.6k
50 votes
6 answers
50k views

How to illuminate the darkness inside glass objects in Cycles?

My model has a clear plastic (or glass) dome with objects inside. The objects appear dark. I've tried the glass shader with color 100% RGB, with very small IOR, and using just a refraction shader. ...
DarenW's user avatar
  • 3,119
47 votes
3 answers
27k views

Control Cycles/Eevee material nodes and material properties using python?

How can I define the different properties of an Cycles/Eevee material? Such things as glossy, glass, diffuse, RGB-color, emissive via python scripting?
binaryBigInt's user avatar
  • 1,037
24 votes
2 answers
11k views

Black artifacts when looking through many transparent objects?

Using v2.73, cycles and a very simple scene: an array of cubes, no big deal. If I set the shader's material to transparent, the cubes in the foreground do become transparent but those far away in the ...
user avatar
12 votes
3 answers
15k views

How do I get the Glare node to output transparent instead of Black background

This is what I have so far: The rendered image has a transparent background, but the glare filter creates an output with a black background, so after merging the two togheter, the background turns ...
tacofisher's user avatar
286 votes
4 answers
566k views

Can Blender render pngs with the background transparent?

I would like to render an animation as a series of .png images with transparent backgrounds for use in a video. Is this possible?
A Wild RolandiXor Has Appeared's user avatar
66 votes
3 answers
379k views

How do I put an image texture on a material in Cycles?

I am creating a model of a glass and I would like to put a drawing on it (a png picture). I know how to do it using Blender Render, but not with Cycles Render. Help :)
bluszcz's user avatar
  • 763
96 votes
3 answers
236k views

Enabling GPU rendering for Cycles?

I want to enable GPU rendering, but there is no option in User Preferences > System: Why is this? How can I get cycles to render using my GPU?
9 votes
3 answers
14k views

Why does an object with a glossy shader render in black?

When I apply a glossy shader to the material of my text, the text becomes just black. Why? I have lamp and everything, but the problem persists. The text is red before I add the glossy shader. I'm ...
BigBoe's user avatar
  • 99
88 votes
2 answers
83k views

How is Cycles different from Blender Internal?

How does Cycles work and how is it different from Blender Internal? Which is better?
gandalf3's user avatar
  • 156k
18 votes
5 answers
43k views

How to properly hook up various maps types in Cycles?

I created some texture maps in MindTex to use in Blender, but I can't figure out how to properly hook them up. The maps I have: ...
David Prentice's user avatar
41 votes
3 answers
35k views

How can I make a material only apply to a side of a plane?

How could a one-sided material be achieved with the Cycles renderer? I would like to create a plane that is completely transparent from one side, and a mirror from the other side. It would be cool ...
horace's user avatar
  • 657
8 votes
1 answer
7k views

Strange black shading. Cannot fully light mesh. (Cycles)

Here is the viewport in material view. The node setup is just a PNG texture into a diffuse shader. And this is in rendered view. I've tried using environmental lighting as well as a directional ...
Nghillaz's user avatar
  • 325
14 votes
1 answer
5k views

Render semi-transparent volume with cycles

I want to render an image of a fire in cycles, but as a png with a transparent background. Without a transparent background, the output image looks like this: But as soon as I tick the "Transparent" ...
Isa's user avatar
  • 243
25 votes
1 answer
57k views

How can I make a more realistic glass shader? [duplicate]

Here's a sample scene: A room with a window, a point light to project light into the room, an HDR environment outside the room and a nice Image by Rembrandt that should be somewhat reflected on the ...
user avatar
12 votes
1 answer
7k views

How can you smooth the edge between two materials?

I have created this with cycles: But the edge between the glowing and non glowing materials is very sharp. The material was manually applied to faces in edit mode. Is there any way I can smooth the ...
Qwertie's user avatar
  • 7,016
49 votes
7 answers
82k views

How to blur a texture node in cycles material?

For a Cycles material I need to blur a texture. If the texture where a Texture Image node, I can blur the image before adding it but in my case I need to blur a Voronoi Texture and so I can't do it. ...
PhoneixS's user avatar
  • 1,864
30 votes
3 answers
31k views

Cycles: Shadeless "Shadow-catcher" Material for Rendering onto Footage

I am superimposing CGI over video footage, and have run into a problem in making materials for objects that act as 'shadow catchers'. Essentially I want a shader that is shadeless—like an emitter—but ...
Jollywatt's user avatar
  • 415
5 votes
1 answer
11k views

Cycles not rendering image or movie clip used as background in the viewport

First time I've used cycles rendering engine. I'm using a movie clip as the background in short animation. Selected RBGA under Property Tab, and Transparent under Film Tab. It looks good and ...
SwanSong2's user avatar
16 votes
3 answers
9k views

How to properly render smoke on a transparent background?

When rendering volumes with Film > Transparent enabled, the alpha appears to be the wrong type (premultiplied/straight). In the 3D view it works as expected: This is a known bug. Is there any way to ...
gandalf3's user avatar
  • 156k
15 votes
3 answers
39k views

How to place a .png texture with transparency over a material

I am trying to create a low poly face with a face from a .png file. The issue is I already have material placed for hair and skin, as shown in the picture below. I have created a .png file with a ...
RollRoll's user avatar
  • 1,203
7 votes
2 answers
5k views

Transparent textured planes produce black artifacts

Having problems with hair transparency using cycles. I ported over a model from daz studio (have done this a few times before with no issues). Using a simple mix shader, transparent top, diffuse ...
Pewposterous's user avatar
12 votes
1 answer
21k views

How can I setup a Material in Cycles for Z-Transparency?

After converting to nodes in order to render using Cycles I've no idea where to enable the z-transparency. I guess the image textures alpha channel needs to be pluged somewhere but I've no idea which ...
stacker's user avatar
  • 38.3k
45 votes
2 answers
19k views

How do I convert materials from Blender Internal to Cycles?

I know this may be a tough or confusing question, but I have numerous existing materials I created and reuse for a project, which were all prepared for Blender Internal. Now, I want to start the ...
A Wild RolandiXor Has Appeared's user avatar
23 votes
3 answers
7k views

What are the technical differences between F12 render and viewport preview?

What are the technical differences between F12 render and viewport preview render, if any? This is all the documentation I could find about Cycles viewport rendering: interactive rendering can be ...
gandalf3's user avatar
  • 156k
40 votes
1 answer
48k views

How to assign a new material to an object in the scene from Python?

How can I assign a new material to an object in the scene via Python?
binaryBigInt's user avatar
  • 1,037
5 votes
1 answer
7k views

Render looks way different from viewport render mode. How can I fix this?

I'm trying to make a test render of my model. But everytime I render it the render looks completely different from the viewport. The viewport is in render mode so it should look something like that, ...
Jbijkerk's user avatar
47 votes
3 answers
25k views

Iridescence In Cycles?

Is it possible to create an iridescence shader in Cycles? Specifically for something like DVDs, soap bubbles, engine oil, etc..
gandalf3's user avatar
  • 156k
44 votes
3 answers
58k views

How to make a cycles light emisson object invisible to the camera?

In my scene it is required to position the lights close to the main object like this: How I can make the light source invisible to the camera?
p2or's user avatar
  • 15.5k
23 votes
3 answers
75k views

Export cycles material to unity

I have been experiencing an issue that once I have a material created and looking the way I want it, I cannot seem to export it correctly with the textures mixed. I don't know the correct words to ...
Liam Ryan Wilson's user avatar
11 votes
1 answer
34k views

Image Alpha Background Renders Black when using "Import Images as Planes"

I must be missing something here. I'm doing an extremely simple Import Image as Plane using the AddOn and the imported image has an alpha background but it renders (and even previews in the material ...
Dale Forbes's user avatar
9 votes
2 answers
4k views

Rendering fire animations with transparent background

I'm creating a simple fireball sprite for my game and I want to render a fire animation. I would like to get the upper images with transparent background, but when is set the transparency on under ...
TheLast_BlenderBender's user avatar
20 votes
4 answers
32k views

Rendering smoke in Cycles?

I am trying to render smoke in cycles, but the relevant blender manual page is designed for Bender Internal. I have everything set up except for the material. I imagine you would set up the material ...
Stephen's user avatar
  • 5,669
39 votes
1 answer
103k views

How can I render an object with an hdr background?

I have an object with an hdr for the background. What do I do in Cycles to render the background with my object? How is this different from an ordinary render in Cycles? The hdr is a big one, 350MB.
Leonardo-Paradox's user avatar
28 votes
1 answer
7k views

What is the the ASC-CDL node?

The color balance node in the compositor can be switched to use the ASC CDL How is it used? How is this different from Lift/Gamma/Gain? How do the Offset, Power, Slope options affect the image?
user avatar
25 votes
3 answers
33k views

fluid in a glass

I am at beginner level. One of the projects I am doing is to create a glass with fluid. Like a glass of water or a glass of wine. Now I can find quite some tutorials on how to create the glass, but ...
user avatar
14 votes
3 answers
13k views

Cycles : shadows on smooth shaded mesh, strange behavior [duplicate]

I wonder if this is a bug, or if I missed something... When a light hits tangentially convex surfaces with "smooth shading", the shadow on this surface seems to "partially ignore" the smoothness of ...
Polosson's user avatar
  • 6,514
1 vote
2 answers
2k views

How to put a mask into 3d space

I'm trying to make a vfx scene where a mesh I created passes behind an object in real life/the video. I've tried to make a mask around the real object, but that makes all of the objects that are ...
Stacks's user avatar
  • 99
30 votes
3 answers
21k views

Node for setting render colour, regardless of lighting

I'm trying to make a material node setup to set final render colors, regardless of lighting conditions. Is such a setup possible?
ajwood's user avatar
  • 10k
29 votes
2 answers
7k views

How can I create Light Streaks in Cycles?

I'm trying to make a light paths like there: To achieve this light threads (streaks) I used a particles emmiter with shining icospheres and motion blur shutter like Andrew. I got this result: First ...
Ilya Kanatov's user avatar
12 votes
4 answers
17k views

EEVEE and Cycles render lighting differences

I get different lightning render with the same scene camera setup. Cycles render (both experimental and supported feature set) gets weaker lightning and needs more energy. How can I get the same ...
intruderia's user avatar
12 votes
3 answers
20k views

How do you make an image emission without washing out the image?

I am trying to make a computer monitor. This means I have to have an image texture for the screen. My image texture is currently connected to an Emission BSDF shader. Unfortunately, when the emission ...
leigero's user avatar
  • 1,189
11 votes
2 answers
24k views

How do you animate image texture materials in blender cycles with keyframes?

I have an image texture material on a mesh already in blender cycles 2.75... I was wondering how to change the material with keyframes so it changes to different pictures in the animation... I tried ...
Noah's user avatar
  • 413
6 votes
2 answers
3k views

How can I render objects with very shiny surfaces?

I am trying to render a kitchen sink / Faucet Here is another reference image of what I want What I have got so far is this Settings for World: I have used an environment map HDRI with 0 ...
Saad Aziz's user avatar
16 votes
1 answer
14k views

Liquid / glass interface IOR and normals in Cycles

When modelling / rendering a glass with liquid inside (in Cycles), which direction do the normals for the glass only surfaces, shared glass-liquid surfaces, and liquid only surfaces point? I have ...
Qutorial's user avatar
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