Questions tagged [compositor]

Questions pertaining to Blenders internal image compositor. The compositor is used for manipulating the final result after rendering.

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31
votes
2answers
16k views

How do I exit a node group?

I selected a bunch of nodes that I wasn't using and that weren't connected and thought that I would see if I could group them. Well, Blender let me group them alright, but now there is a green ...
26
votes
4answers
13k views

What is Ambient Occlusion?

What is Ambient Occlusion and what are some of it's uses? I see it is used in creating what might be called "shadow catchers" in the following node tree setup:
26
votes
3answers
14k 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 ...
25
votes
1answer
33k views

Planet texture generator

What cross-platform (or cross-browser) resources are available to help make texture maps for generating beautiful planetary images using Blender (Cycles)? Ideally, these would include: Terrain maps (...
23
votes
1answer
4k 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?
22
votes
3answers
24k 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 ...
22
votes
3answers
3k views

Scrolling credits

I used blender as all in one application. I model, animate and compose in it. Now I need to add a simple scrolling credits at the end on an animation. I want to know if there is a easy way to make ...
22
votes
2answers
7k 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 ...
20
votes
2answers
8k views

Post-processing Lightsabers in Blender

I've been studying JamesVillanueva's lightsabers for a while now, and have tried to recreate the effects in Blender. The trouble I'm having is with the blade in the compositor. Keep in mind that I'm ...
20
votes
3answers
23k views

Save all render passes to a single EXR image

I am having an issue with EXR file export that I did not encounter in previous versions of Blender. I used to be able to render a render layer with all its passes and get all the passes included with ...
18
votes
2answers
1k views

How do I use the compositor to output colour based on the depth of objects?

This setup seems like it should work, but it doesn't.
18
votes
2answers
11k views

How can I resize/move the “canvas” of an image in the compositor?

As you can see, if I try to translate an image in the compositor, it does not affect the actual bounds of the image, only the pixels themselves. The same thing happens when trying to scale an image: ...
18
votes
2answers
3k views

How to save the render result within Blender

Is it possible to render an image and have blender remember it, so that next time I open the file the render result will not be blank? I am not talking about saving to an external file. Specifically ...
16
votes
1answer
2k views

How to achieve screen tearing effect or video glitches

I do not know at all what this effect is called, therefore I cannot search for the answer on the web. I am referring to the thing where the RGB color will shift individually when the camera jitters/...
15
votes
4answers
5k views

Is there a way to make comments in the node editor?

I'd like to have a node like the Frame node but one that can have lots of text, not just a header. I've looked and it looks like there isn't any such capability so far, so I was wondering how easy it ...
15
votes
3answers
7k views

How to get a smooth curvature map from a normal map?

I am trying to generate a smooth curvature map from a normal map. I already know how to generate a sharp curvature (from this post: How to convert a normal map into a curvature map ) Here is the ...
15
votes
2answers
2k views

Make the flame of a candle more yellow

Here is what I have so far: The issue is The candle looks like a light bulb... when I tried to make it more yellow via RGB Curves the whole thing got more yellow: Can anyone help me out? Thanks!
15
votes
1answer
2k views

How do you calculate square root with nodes?

I'm creating my own merge functions in the compositor, but I've run into a bit of a wall. How do you calculate the square root with nodes? Would one have to write a python node to do this? If so, what ...
14
votes
1answer
15k views

Using scenes and render layers to composite an object isolated on white background with shadow

I composite 3 individually rendered and saved files to achieve the look of an object isolated on white with a proper shadow: image file of object floating with alpha background image file of a render ...
14
votes
2answers
867 views

Is there a way to get rid of this square artifact coming from lens distortion?

I've got a noisy render that I'd like to composite with slight lens distortion (Fit=True, Distort=0.03, Dispersion=0.001): I'm noticing a repeating pattern of square artifacts in the output of the ...
14
votes
2answers
11k views

How do I use nodes to combine two images when both have transparent areas?

Is there a way to use nodes to combine two images if both the images have transparency (i.e. alpha channels)?
14
votes
3answers
14k views

How can I use the compositor on the result of the sequencer?

I recently ran a renderfarm on a file with some compositing setup, but I forgot to set the composite output back to the Composite node instead of the Viewer I was temporarily using. Since the node ...
13
votes
4answers
10k views

How to create a gradient backround in the compositor?

I want to add a gradient background to my render, but within the compositor (not with the actual background world setting of the scene). I would also like to don't have to use an image (neither ...
13
votes
4answers
11k views

Color correction in the compositor from the video editor

How can I connect clips from the timeline in the video editor to the compositor to add some nodes-color correction, rgb curves etc., to every single clip, or to all of them at once?
13
votes
4answers
5k views

How to visualize a value resulted from math node?

How to visualize a value resulted from math node,or just to know it. I tried the way of scaling this value to the scene size and then pick the color and get the value but I want more effective way to ...
13
votes
1answer
2k views

How can I create and project a symbol/rune on a sculpture? (like Blizzard's games)

How can I create and project a symbol, rune or logo to a sculpture and make it look like it is from a Blizzard game? What are the sculpt brush settings to project it on any surface (flat or round), ...
13
votes
3answers
6k views

How can I make a “Movie Clip” node start at a certain frame of the scene?

When I use "Movie Clip" node in Blender 2.7, it always starts at Scene Frame 1. How can I change it in order to make it start at Frame 6, for instance? The movie clip I am using is a Movie FX for ...
13
votes
2answers
15k views

How can I add Lens Flares/Halos?

Is there an addon, or an easy way to add lens flare effects or light aberrations in Blender? I've been using Blender for a while now, and it's very time consuming to always have to export to another ...
13
votes
2answers
10k views

How to convert a normal map into a curvature map (per pixel curvature)

I am trying to generate a sharp curvature / cavity map in the compositor from a normal map but I don't know the node setup. Here is my reference: http://polycount.com/discussion/comment/2273084/#...
13
votes
1answer
1k views

What are the denoising passes useful for in 2.79 experimental feature set?

In 2.79 when experimental feature set is activated, there are some new passes available to the compositor if Denoising is enabled. The new passes that are there after rendering the denoising pass ...
12
votes
4answers
2k views

Where do the white lines come from in my composite?

I'm having this issue for years now, and I'm not sure if I am doing something wrong on my end, or if what I would like to achieve - or expect to see - is even possible. My question is about ...
12
votes
2answers
3k views

Stacking cycles renders in the compositor?

There's a blog post going around about a plugin that uses ImageMagick to stack Cycles renders together. Why can't we do this in the compositor, and with a still frame? Is there a way to "get ahold ...
12
votes
1answer
2k views

Blender (Cycles) Manual DOF

Is is possible to increase the depth of field in cycles while keeping the same blur size? I know this is not physically correct, but in some renders this would be useful. Here is a demonstration of ...
12
votes
2answers
4k views

What is the workflow for compositing Fire/Smoke with Cycles

Since fire/smoke is currently only supported in the internal renderer, what are some good workflow ideas for bringing fire and smoke into a cycles scene. My current idea seems too labor intensive: ...
11
votes
1answer
5k views

Controling compositor by python

I've been looking at the python code loging of Blender. But in there things get loged as mouse clicks. What i like to do is combine a few images into a larger one using compositor, but i need control ...
11
votes
3answers
1k views

Can the compositor be used to batch process images?

There are tools to batch process images already of course, (such as ImageMagick), but this isn't as flexible as Blender's compositor since they typically perform linear operations and don't have the ...
11
votes
2answers
12k views

Can I make a custom node from a group and have that available in other projects?

I've found some neat combinations of nodes to create certain effects, so I'd like to make them a group and then have that node available on my list of available nodes, even when I reload the startup ...
11
votes
3answers
11k views

Is there a way to save composite node presets?

Is there any way in Blender to save settings in your compositing node setup. For example say for my shadow catcher I have it setup for a hard shadow for sunlight, and then I also have a setting for ...
11
votes
2answers
1k views

What is the difference between a Viewer and a Compositor node?

I was messing around with a scene earlier today and looked up some tutorials on chromatic aberration, and I noticed that all the tutorials I found had both a compositor node and a viewer node? Is ...
11
votes
1answer
2k views

stormy rainy window effect

I'm making an indoor scene with a storm outside. I want the windows in my scene to have rain just bucketing over them. Ideally I would like some animated effect that can be composited over the ...
11
votes
1answer
6k views

How do you import a Compositing Node Set-up?

I have a Compositing node set-up for a lomography effect that I want to export or append to other blend files. Is there a way to do this? I tried grouping the nodes, but the group wasn't appearing ...
11
votes
1answer
2k views

Infinite Tunnel Droste effect

I've been looking at videos that create what is called Droste Effect where an image contains smaller version of the same image and they spiral ifinitely into each other. like Escher's Print Gallery ...
11
votes
1answer
955 views

Recreating Mandelbulbs with math nodes

I'm trying to recreate a Mandelbulb using Volume and math nodes in blender. I have been able to create a Mandelbrot with math nodes but I am having problems making it 3d. I tried translating this ...
10
votes
3answers
1k views

How to capture lighting in video shots?

How do I best capture the lighting in a video shot so I can easily insert rendered objects into the scene that are correctly lit?
10
votes
1answer
5k views

Adjusting Freestyle in the Blender compositor

Can anyone tell me if it's possible to adjust freestyle in the compositor? I'm using it in my short film and its a drag to actually render the whole thing every time to see the changes I made. ...
10
votes
2answers
2k views

What are nodes, and how do I use them?

I'm a bit new to Blender, and in trying to learn more, I've stumbled across nodes. What are nodes, and how do I use them?
10
votes
2answers
528 views

Reverse effect of Defocus node?

I am trying to reverse the effect of the Defocus node as shown below : As you can see the Front is being blurred and the back is focused , is it possible for the front to be focused instead?
10
votes
1answer
2k views

How can you use vector blur in Cycles with fluids?

I know (at least I believe this to be true) that using cycles motion blur wont work with fluid simulations when rendering, however, I know that vector blurs can be used in place of motion blur. With ...
10
votes
1answer
1k views

How to utilize the denoise passes to build a denoise node network in the compositor

I've built custom denoising node networks before in houdini's compositor, using raw passes combined with noise reduction nodes, but I'm not sure how to utilize the various blender denoiser passes to ...
9
votes
3answers
5k views

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

This is what I have so far: http://imgur.com/a/ZnFOt The rendered image has a transparent background, but the glare filter creates an output with a black background, so after merging the two ...

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