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Questions tagged [rendering]

The action of turning a scene into an end product such as an image or movie. If your question is specific to one render engine, please use its respective tag (cycles, blender-internal, etc).

180
votes
3answers
230k 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?
92
votes
2answers
26k 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 ...
87
votes
10answers
61k views

How can I pause a render in progress and then resume it at a later time?

I would like to pause a render that I have started, with the intention of resuming it at a later time (but during the same Blender session). How can I do this?
78
votes
3answers
176k 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?
71
votes
2answers
69k views

How is Cycles different from Blender Internal?

How does Cycles work and how is it different from Blender Internal? Which is better?
66
votes
5answers
81k 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-...
55
votes
7answers
21k views

How can I make sharp geometric 3d models look more realistic?

I'm making a scene in Blender with manufactured mechanical and electrical objects - cylinders, metal objects and so forth. I want to make these look real, be fully present with a sense of mass and ...
52
votes
4answers
53k views

Render just part of a final image from Cycles?

I'm using an older Nvidia chip that hates running viewport renders, and I need to check if changes to the materials on a few objects not far from the center of my scene are (I'm rendering a floorplan ...
51
votes
2answers
17k views

Creating a Black Hole in Blender

I recently saw the film Interstellar and it was fantastic! The effects blew me away and it got me in the mood to try and re create the black hole, however I haven't been able to find any information ...
40
votes
3answers
33k views

How to make a model cast shadows onto the world texture/background?

In most of my models, I usually end up setting a world background using an HDRI image of some kind or another. This has always been really useful for lighting in general or as a background for my ...
37
votes
3answers
49k views

How do I clear the render border?

In the 3d viewport I am using a border region to only render things inside the selected region. I did this with CtrlB. I cannot get rid of the region. How can I make the border disappear?
36
votes
8answers
32k 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 (...
36
votes
3answers
10k views

Cause of black artifacts in render?

I was following this tutorial on creating a watch and noticed that when I rendered the watch, some pieces were messed up. I'm new to 3D modeling and I've just learned Blender, I can't explain it well,...
35
votes
2answers
50k views

Why are some faces in my mesh darker?

While rendering a mesh with smooth shading on, I get a dark region/shadow on certain faces. The effect is more evident when smooth shading is applied to a mesh containing ngons, with the ngons turning ...
34
votes
2answers
3k views

How to make a holographic reticle shader in cycles

Does anyone have a lead on how to set up a shader in cycles to mimic the behavior of hologhraphic sights in blender, as shown in this image? I don't want to have to try and figure out exactly how to ...
34
votes
3answers
11k views

Iridescence In Cycles?

Is it possible to create an iridescence shader in Cycles? Specifically for something like DVDs, soap bubbles, engine oil, etc.. I know about this technique for a DVD material, but it doesn't properly ...
33
votes
3answers
65k views

Preview rendering the current view from the viewport?

How can the current viewport view be rendered as a preview?
32
votes
3answers
94k views

Object not visible in render

I have a model which you can see here (camera perspective). In the second image, you can see how the render turned out. I'm at my wit's end trying to figure our why it's not showing up in the render....
32
votes
3answers
34k 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?
32
votes
1answer
19k views

What's the purpose of the EEVEE rendering engine?

Is it an alternative to Cycles, or just for the 3D viewport?
31
votes
3answers
31k views

Can Blender render animated gifs?

I need to save an animation as an animated GIF. Can this be done from Blender? cheers.
31
votes
4answers
17k views

Is there a way to batch render multiple scenes?

I have animations in 4 different scenes in my Blender file that I would like to batch render. Is there a way to batch render all the scenes, instead of only the scene I am working in?
30
votes
2answers
118k views

How to render an animation as video in Blender?

Yesterday I was working on a simple animation, an animated logo. Here is an image of the progress: I already have the animation working and everything is okay with the project, but I can't figure ...
29
votes
3answers
3k views

What does the simplify AO bounces value do?

I recently discovered that turning on Simplify in the Scene panel, and setting "AO Bounces" to 2, reduced my render times from 30 minutes to 10 minutes. A three times speed improvement! But... I still ...
29
votes
2answers
25k views

Is there really a way to make a true toon shader material in Cycles?

Is there a way to make a true toon shader material in Cycles? Here's, in order of importance, what would be ideal to find in such a shader: Must use Cycles Must be an actual shader Must not rely on ...
28
votes
2answers
18k views

What is branched path tracing and how is it useful?

I noticed recently that there is a new option in Cycles for "branched path tracing", can someone explain what this does in easy to understand terms? Should we expect faster render times or less ...
27
votes
1answer
5k views

How do I emit light from inside a object?

I need to know how to make the buttons in my blender project look the same as in this photo. Mine all look pale, even with the emission material. Is there anyway I can get my buttons like this?
26
votes
2answers
11k views

Can Cycles renders be done from the command line?

It seems that Cycles is mainly built in the form of Python scripts (as far as I can tell). Is it still possible to use Cycles to render a .blend file from the ...
26
votes
3answers
7k views

What is the difference between the displace socket and a bump map?

Aside from the fact that you can control the bump mapping per shader with a bump node, are there any differences between these materials? As far as I can tell, they are the same. Is the displacement ...
25
votes
5answers
11k views

How to find image coordinates of the rendered vertex?

I have a simple mesh of a cube. I would like to know what are the coordinates of each vertex in the rendered image (i.e. for each 3d vertex I'd like to know it's pixel coordinates). Is there a way ...
25
votes
2answers
15k views

Light spectrum dispersion effect in Blender?

I'm trying to achieve the effect where a beam of light sent through a prism or other refractive object, separates out into the light spectrum. (See image below) This effect is especially useful to ...
25
votes
2answers
1k views

How to understand the math behind Andrew Price's embedding his beer within his glass

I just watched the Blender Guru video How to Make a Beer in Blender and stopped at the point where it advises us to make the liquid slightly larger in diameter than the inner diameter of the glass - ...
24
votes
4answers
18k views

Glow with depth in Blender?

What would be a way to create a glow in Blender. For that purpose I've been always using the compositor. However, that is pixels work, which means it is a 2d work. To make a 3d one, do I have to use ...
24
votes
2answers
56k views

No file output after rendering?

I usually am able to render successfully to the c:\tmp folder, but when I came into work today, I rendered out the image on my work laptop, and everything seems to ...
24
votes
9answers
37k views

Any Video formats that render with Alpha Channel?

Does anyone know if there are any video formats (besides the HUGE uncompressed avis) that you can render in that maintain the alpha channel? (i.e. for after FX etc.) I used to use quicktime, but ...
24
votes
4answers
12k views

Cycles hybrid rendering

The Cycles render engine can render both on the CPU and the GPU. I often render over-night so I do not need my computer to be responsive. Is it possible to render with Cycles using both the CPU and ...
23
votes
2answers
4k views

What is the difference between Sobol and Correlated Multi-Jitter sampling patterns?

In Cycles we have two options for sampling patterns. The default is Sobol, there is also Correlated Multi-Jitter. The manual has this to say about sampling patterns: Pattern Random sampling ...
23
votes
2answers
85k views

Render not showing UV texture

I have added a texture to a cube in the UV editor and it shows up fine in textured view But when I render it there is no texture What have I done wrong?
23
votes
3answers
57k views

How to add a sky in cycles?

Im still taking baby steps with Blender (2.69) I was hoping to add a sky to my scene using the settings mentioned in the help. I have a sun lamp in my scene, but I cant spot where the options are ...
22
votes
1answer
44k views

How do I increase the render distance?

I have created a simple model here When rendering it the end of it is cut off How can I get the camera to render a longer distance?
22
votes
3answers
4k 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 ...
22
votes
2answers
6k views

Shadowless render pass

I would like to have full control of the shadows in post production. That's why I would like to have A shadow render pass containing only the shadows of my scene A shadowless render pass containing ...
21
votes
3answers
806 views

Zoom window magnification

What is the best method to get a magnification effect within an image. More specifically, I am interested in getting a portion of the image zoomed in, with a boundary and the zoom lines annotated, ...
21
votes
3answers
22k views

How can I get a Depth of field render pass?

How can one make a render pass with black and white data to display depth of field based on the Settings > Camera dof settings? I want to blur or defocus in the compositor, similar to the way it is ...
21
votes
2answers
13k views

How to Construct a Diamond or Other Gemstone Material in Cycles

What would be the material or shaders node set up for a smooth gem in blender cycles engine? I want a result similar to this image:
21
votes
1answer
8k views

What does the compression setting do to a PNG?

I was most surprised to find that the compression setting in the render settings, made a huge difference in the file size of a png. Is there any image quality degradation with the compression on? ...
21
votes
3answers
10k views

Exclusive lighting

Is (or will be) there any sort of light linking in Cycles, or a method to get a light to affect only certain objects that doesn't involve compositing two or more different render layers? Sort of what ...
20
votes
6answers
3k views

Why do normals exist?

I know what normals are, because I took physics. However, I have this question: why do they exist in blender? The only use I've ever had for them is negative side effects. They make my mesh render ...
20
votes
2answers
6k views

Can you change the render seed for each frame of an animation in cycles?

When Animating using cycles, the noise always looks like it is stuck to the screen, is it possible to change the render seed for each frame?
20
votes
3answers
53k views

How to save render?

Every time I render an image and try to save it, it just disappears. How do you exactly save a render? I am using a mac.