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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Toon Shader Cycles- Change Color of Shadows

I made a character for a mobile game in Blender, Cycles, and i used a toon material as shader. Now, for each toon material i create, i used an 'Image Texture' as a color gradient. I like the result, ...
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File format changes from MPEG to .DVD

I have an issue with rendering an animation. I set the file format to mpeg but when it finishes rendering the output file that it gives me is '.dvd'. How do I solve this problem?
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Copy scene node tree to other scenes

I have a Blender file wih many scenes and I want to copy the node tree of one of them to the other scenes. From Blender interface it is a very simple task, in python I have tried using bpy.ops.node....
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Blender on Windows is skipping python script. (brenda on windows)

We've been using Brenda for quite some time now for rendering architectural stills. Since our editing stations are doing nothing at night, I started making a desktop app that allows you to pick jobs ...
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1answer
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Antialiasing textures in cycles (Blender 2.77 and higher)

I would like to get an answer to a frustrating question. https://wiki.blender.org/index.php/Dev:Ref/Release_Notes/2.77/Cycles In this link is "Anti-Aliasing is now enabled for baking. (c359343)" ...
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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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Cycles Renderer - Updating Shaders and Images Every Frame?

This question is more of a curiosity to the potential of increasing render times, however, after finding very little out about this anywhere else, I am thinking it may be an intentional feature. I am ...
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Is there any way to get single pixel wide aliased lines?

I'm trying to get clean, one pixel wide lines on my renders like the pic below, but nothing I try seems to work. I've tried freestyle with one sample, but I get extra pixels at some parts of the ...
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How do I colour a fluid simulation in Cycles based on velocity?

I want to assign a gradient to the water simulations I have. I want to do this by the velocity in the current voxel, so the fastest moving areas will be red and the slowest blue. How would this be ...
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Seamless Procedural Texture in Polar Coordinates

I've written a Cycles node tree to convert rectangular (X,Y) to polar coordinates (R,theta) as the basis for a procedural texture with radial symmetry. However, there is a seam in the texture where ...
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1answer
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Force Cycles GPU rendering for a Render Farm

So basically I'm on vacation for 2 weeks with a laptop without a CUDA device. I do have access to a render farm with GPU rendering support. Now the problem is that I can't setup blender to render in ...
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Optical flow generated from cycles render is not proper

Scene generated from Blender, and flow is given. As it can be seen the flow generated is not proper, it is in a zig-zag format. I see the scene at and above horizon have more zig-zag. Can someone ...
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Determining if Cycles light rays provide direct illumination or self-shadow

I am looking to render Saturn and its rings. The sun illuminates the diffuse material of the rings on their sunlit side but their backlit side needs to have an emissive shader. However the rings must ...
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is there any way to get to velocity of a fluid and use it in the cycle material editor

I'm trying to use flip fluids to make lava is there any way to use the motion blur vectors, or get the velocity to mix a material. or in the script editor is there anyway to drive that.
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Vertex colors with skin modifier

I have some curves that I want to render in Cycles; these are not blender curves, instead they are composed of a set of vertices, each having a color, and edges (but no faces). Using the skin ...
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GPU Rendering Stopped Working

I was using GPU CUDA rendering with Cycles and it was working fine, but part way through the render it stopped working and I had to continue the render with the CPU. Now the "GPU Compute" option in ...
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How can I bake a normal map with smooth, beveled, edges, when the low poly has sharp ~90° edges?

Background I have been trying to solve a seemingly simple problem with normal map baking in Blender 2.9 since last weekend. I wanted to make sure that I read and researched as much as possible before ...
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1answer
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Hair partially disappearing in render after combing

I got a weird problem. Patches of hair on a rug for a bathroom scene are disappering in my render, but only if I entered particle edit Mode and combed the hair before. So, I start out setting up my ...
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Strange light from glass

I'm doing a scene with a room with a table. On the table I have some wine glasses, but I get this strange light from some of them. The glass to the left looks OK, but the other are not OK. It seems ...
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Particle Instance Modifier : colour each instance based on the emitter texture (like Hair strands materials do)

In cycles, with particle hair strands, I can get the colour from the texture of the emitter object for colouring the entire strand. When I use the "Particle Instance" modifier on a mesh (a simple ...
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Using Particle systems on an Array Modifier's Cap

I'm new to Stack Exchange, but I've been using blender casually for the past year, or so I'm currently working on a city, for the purpose of learning and fun. To save myself from building a lot of ...
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Nvidia GPU not showing as Compute Device for Cycles

I have a question concerning my GPU Cycles Compute Device. I am running MacBook Pro 10.12.5 with a NVIDIA GeForce GT 650 M. I have done my research a bit and stumbled upon a confusing area. I ...
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nVidia skin shader with the Principled BSDF

I've been using a skin shader primarily based on the Brecht skin shader, which is itself based on the Sum-of-Gaussians approach as seen in 14.4.7 from GPU Gems by nVidia. Its Cycles adaptation, which ...
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Render on Tesla K80

I'm trying to render on a Tesla K80, but it doesn't work. blender --debug-cycles outputs ...
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How to create an all-around night sky in Cycles?

So I created a night sky following this video https://youtu.be/9vbq6HOgA2w It was going pretty well until I noticed that only half of the world actually looks decent. The bottom half/ middle is this ...
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How can I render a proper normal pass for smoke in cycles

I would like to render a normal pass for smoke in Cycles like this one: I'm aware of this method mentioned in Blenderartists but the result is far from the result needed to relight in post (via ...
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Why does this add shader create so much noise?

This question is based on the shader in this answer. When I render the scene using plain glass for the material ball, it takes about 500 samples to converge. Here is the node setup and the result at ...
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Copy node tree from one material to another in cycles using python

I have two cycles materials (say source and target). I want to copy the Shader Nodetree from the source material to the target material after clearing any currently present node tree(s) in the target ...
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Make object not receive cast shadows

I know you can make an object not cast shadows on others by disabling Shadow in Ray Visibility. But how can you make an object not receive shadows cast by other objects?
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Synchronizing object in Cycles

I have a model of a butterfly that uses a displacement map for most of the detail on the mesh at render time. To get an accurate render, I have it subdividing 4 times for the render before applying ...
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How can I make a holographic material in cycles?

I'm talking about those holographic designs you sometimes see on stickers and foil, not free floating holograms. Examples here. I also want this to change colors as real ones do when you rotate them. ...
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Is there a way to get the vector to the closest UV seam?

I am looking for a way to get the distance to the closest UV map seam in UV-space as a vector in the node editor. Like this: The blue dot is the current point of reference, i.e. the point where the ...
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Setup network render for cycles render on LAN

I am trying to setup network render with cycles as the rendering engine. My use involves rendering hundreds of images and I have already written logic for it in python which is working fine on single ...
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How to implement a new BRDF in Cycles

I want to implement a new BRDF in Cycles. I've already tried to code an OSL node but I couldn't because the way that BRDF closures are implemented in OSL seem to only permit BRDF closure composition. ...
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Alpha transparency not showing in cycles viewport

Using cycles I have simple cut out people in the scene: planes with .png textures on them. The transparency shows in the material editor and is rendered correctly but is not displayed in the viewport. ...
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How can I use a node-based texture for smoke flow in Cycles?

Preface: I'm thinking that this might be a bug, because the behavior's pretty weird. I'm posting it here in case it is the intended behavior and there's some trick I should use. I can successfully ...
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Why is this happening when I bake physics to keyframes?

So, I'm trying to do some stuff with physics and cell-fracture, and I need motion blur. When I bake the physics and render w/ motion blur, the objets aren't in the scene. So I tried baking the physics ...
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Dynamic Paint Brush Erase doesn't work in Render Output

Got some problems when trying erase colors with a Dynamic paint brush. I have plane which is affected by particles Dynamic paint brush (surface & color). When I try erase some spaces on the plane ...
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Cycles - How to transfer information from a shader to another non-destructively ? (no baking)

How can we non-destructively (witouth baking anything into vertex color nor bitmap) transfer information from one shader to another within cycles ? Here's an example : Here is a simple proximity ...
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Cycles and EEVEE strange polygon problems

to the point: Why are polygons visible when rendering on cycles (Attention to the wheel), but not on eevee? hdri is same on both renders. The wheel has a smooth shade. In solid mode, everything is ...
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How can I model this Body in Blender?

Hello Blender Community, I am new to Blender. In the past, I only used CAD Programs (Inventor, Fusion 360). Because of the Rendering and Animation, I try to recreate my models in Blender. One of my ...
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Emision Catcher for Blender

I realised that the shadow catcher for cycles doesn't actually catch emision or act as a diffuse bouncer from the HDRI, as the matter of facts it only catches shadows as stated at https://devtalk....
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Pointiness to Vertex Colors for EEVEE

I am attempting to create some Procedural Weathering Effects on a high-poly model using a similar Pointiness method to that discussed in my previous question and answer here. Whilst Cycles provides ...
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Using texture data from texture properties as node data in Cycles

either I'm clearly missing something or I misunderstood the concept, but I hit a wall with something that should be pretty easy (provided it is already implemented in Blender). I'm basically creating ...
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1answer
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How can I sharpen the light fall off for a rotating earth animation with 2 materials?

Intermediate level question. I have been following Andrew Price's excellent tutorial on "How to make Earth". I have managed to "create" earth, and render as a static image. I have returned to this ...
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How to import Alembic Vertex Colors from Houdini correctly?

I've exported a simple scene from houdini with a few geometries, and written into the vertex colors, Cd, for each mesh a different gray value like: (.1,.1,.1)(.2,.2,.2) ... etc When I import this ...
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2.8 Cycle Render Mode ignore Local view mode

When I try to preview an Object in Local View with Cycles, all my objects are rendered together. It seems that Cycles ignores Local View. Is it a bug or is there another method/shortcut for it?
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Cycles Render, Looks wrong in Render ViewPort, correct in Material ViewPort

Using Cycles Render! Have tried things for hours on end and can't figure it out, please help! I simply want to bake the texture from the Material Viewport, but it continues to bake the looks of the ...
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How to remove unwanted refraction (bent-straw illusion) from cycles material?

I am working on a render of Saturn as part of a scale model of the solar system, and have run into a problem with the transparency of the rings. I am using an alpha-mapped png image which seems to ...
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Cycles: realistic light refraction for glass lenses

I found this image somewhere on the Internet: It was made with Cinema 4D and some special renderer. I decided to try create somethings similar using our favourite Blender and Cycles. To achieve a ...

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