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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59 views

How do I render only the particular view layer I want instead of always including a full composite pass?

I have a scene and I'd like to render out PNG layers to make life easier in post-production. I have set up all my layers to render separately. However, Blender is also spending time rendering out a ...
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13 views

Use compositing in video sequencer to pixelate some parts of text in a video

I'd like to use the possibilities of the nodes in the compositor, combine them with the possibilities of the video sequencer and then render it. Unfortunately I wasn't able to get it to work. I'm not ...
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22 views

How do I add my character animation in blender, to a videoclip?

I created a robot and animated the movement with the camera going around it in blender. I also got the video footage from a game (gta v) where I wanna put the robot (also with the camera turning ...
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17 views

Exr files to be saved from File Output Node not saved

I am saving rgb frames as png, and depth info as exr file for my project. To save exr file separately, In Compositor, I connect a file output node from 'depth' and mention its path as '//render/depth/...
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14 views

How to build a six Colorchannel Grayscale Controler in the Compositor (Similar to Photoshop and alike)?

I try to recreate a Color to Black and White converter for the compositor that can handle six color channels, similar to those ones in Photoshop or Affinity. By now, i recreated the standard "RGB ...
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9 views

Compositing-Save/Export

Have they done away with the Save/export option in 2.91? It isn't in my available features under image, and ⌥ Alt + S does not work either. The only way I could get a image save was with my screen ...
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1answer
25 views

Exporting a Denoised Composited Image Sequence

I just finished Blender Guru's donut tutorial, all parts and levels. However I must have misunderstood how the composite node works, especially in regards to animation (or rather image sequences). So ...
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1answer
753 views

How to denoise animations using Blender's Temporal Denoiser?

I've been diving into the secret Blender Animation Denoiser function mentioned in February of 2019 by Pablo and documented on the Developer Site. Here are some things I figured out after digging ...
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22 views

File Output Node not Working in Certain Cases

I am aware of this thread: File output Node not working However this is not my problem. I have used this file to output to files, but I am trying to use a 3rd scene in order to composite the 1st 2 ...
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1answer
39 views

UV mapping node in the compositor. Why can't I subtract some pixels from the alpha channel with a mask?

On trying to answer this question, I can't subtract information from the alpha channel without running into borders that persist from the UV mapping node. Those borders come from the original image's ...
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2answers
64 views

Mask Image Plane in Shader Editor or Compositor

I have an image as plane imported in Blender 2.91: Now I want to mask off the red wine and then animate it so it would fill the glas: Yes, it must be solved in Blender. Tried it in Compositor with ...
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Pixels retrieved from Viewer Node are darker than the actually rendered image… Why?

I am trying to create a pipeline in which I first render an image using the blender python API (I am using Blender 2.90) and then perform some image processing in python. I want to fetch the image ...
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1answer
31 views

Mask Keyframes not showing in graph editor

Blender has a masking system which is available in both the Image Editor and the Movie clip editor. The issue however is that when you add key frames to the mask, it shows up on the dopesheet but not ...
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41 views

How do render times for greenscreen/compositing compare to other Pro Editing Software times (Adobe PP or AE)?

And what times are actually reasonable? My situation: I edit videos using Blender for a Youtuber that has just purchased a greenscreen. I like Blender because I already know how to do all the things ...
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7 views

Aliased blur in compositor

I'm trying to apply a variable blur on my composition in Blender 2.9. However, there is aliasing visible around the edges of my object, and I can't figure out why. It appears to have something to do ...
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1answer
3k views

Which denoiser is better?

In blender 2.81a, there are two denoising tools: Under layer properties, you can scroll down and enable denoising Also in layer properties, you can check "denoising data" under passes > data and in ...
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1answer
1k views

Missing Mist and Z in render layers

I'm Really Confused, There is no Z and Mist under Render layers, I tried clicking what I could and still no clue why they are not there. I'm trying to put mist in the Simulation.
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1answer
44 views

How do I remove green background without replacing it with another background?

My objective is to produce a foreground video clip with a transparent background, that can be superimposed on any background video. I know how to remove the background using compositor, by replacing ...
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1answer
1k views
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1answer
38 views

How to deal with masks and shadowcatcher when compositing 3D elements over an image or video?

I am trying to add 3-D dog ears to a human being in a real life video clip background. I have to mask a portion of the persons hair over the 3-D model ears I created. The problem is I also have to add ...
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1answer
31 views

How to composite an image sequence rendered in PNG?

I've rendered my first image sequences of 119 frames in PNG. I have trouble to use the compositor in order to save the final video file. When I load the image sequence (with the image sequence node) I ...
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1answer
68 views

How to get rid of defocus node artifacts?

When compositing my render with an alpha over node to be able to edit my background and my foreground separately, if I use a defocus node to give my image some DOF, I always run into those weird ...
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1answer
45 views

Why are the colors from color ramps dimmer than what you pick?

If I input a color in a color ramp, and set the ramp to constant, the colors do not come out exactly like the input. They are grayer/darker. Example: On my color ramp, the yellow input is "#...
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1answer
17 views

Motion Tracking. What is the actual scale for “Set Scale”?

When doing VFX and tracking, there is an option "Set Scale" to set the relatively same scale to the 3D interface as the video you're tracking. What is the actual size for the scale (is the ...
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1answer
20 views

How can I programatically evaluate each pixel before final composition?

I'm using a complex compositor node setup, which in the end reduces the image to just a few solid colors. I would like to remove any pixels from the image which have no pixels of the same color in the ...
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1answer
29 views

Simple movie clip sharpening using Compositing - How to do this?

I'm a novice in using Blender and am looking for an easy way to sharpen movie clips. I believe I have to use Compositing, but am not being able to find some simple step-by-step methods to achieve ...
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11 views

How can I pass a value (heightmap) from a material shader to the compositor?

I need to get either the 2d image data, or material data from a texture node, into the compositor. Is there a way to do this?
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1answer
89 views

Index material in 2.8 (Cryptomatte)

I have a lamp. Behind the glass is a source of light. I want to apply effects to the light source in the composer. Previously, this was done using a material index. In 2.8 this isn't possible, there ...
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1answer
2k views

Why does nothing show up in the compositing tab?

I am very new to blender and im trying to follow blender guru's beginner tutorial. He went to the compositor tab and was using it to de-grain an image but when i got there, nothing happens (see below)....
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2answers
54 views

Glare on transparent background using Cycles

In a Cycles scene, I need to render glare around the warp engines, however, the resulting PNG always has the glare cut off when it leaves the body of the ship. This problem is present in the output ...
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2answers
2k views

Live, real time video, compositing onto a virtual studio

Is there a way to use Blender and (say) a 3d virtual "tv studio", together with input streaming from a camera into the application in real time? So, from a physical camera > USB input > here I am ...
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40 views

How to Alpha matte an object with another?

Excuse me, I have two render layers, one for Suzan, the other is for a circle, and I want to set the circle to be the alpha matte for Suzan, like the image below: I tried to do it, but the result was ...
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1answer
70 views

How can I composite Eevee and Cycles together in one animation sequence?

I have a character model that I’d like to render in Cycles only and the rest of the scene in Eevee. This was suggested to me by someone I had contacted sometime ago. He said to speed up render times, ...
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9 views

How should I fix these Armature and Compositing glitches (White flashes)

I made This cartoon water by mixing different view layers in the compositing section. Each of the view layers is rendered properly; however, if there is an animation of the armature; in the water, the ...
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1answer
72 views

Does the compositor affect image quality?

I noticed that the compositing is applied after the image is rendered. Does this mean that when working with an 8-bit Output that the compositor can affect image quality negatively? (i.e. artifacts ...
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1answer
41 views

not able to conect nodes in the compositor

I'm having a weird problem, I've had it before but at the moment I'm using the compositor so much that it's getting really annoying... at the moment I'm working in 2.82a but I've had this problem in ...
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1answer
26 views

Image Editor does not show RGBA output from composite viewer

blender 2.91, I have a problem with Composite viewer node - I'm trying to preview contents using Image Editor however despite having all checkbox set Image Editor does not shows full output, ...
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1answer
5k 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?
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1answer
76 views

Why does the Alpha Over node make my image brighter?

In a Cycles project in Blender 2.9, I want all objects to receive white light from the environment, so I set World Properties --> Surface --> Color to white. But I want the background of the ...
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1answer
15 views

Render Result is different from the Composite node preview

When I try to open image with transparency in Image Editor window it looks exactly like it should. But when I try to show it in Render Result image using Composite node, transparent part of the image (...
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3answers
663 views

Keying node in compositor. How can I associate the alpha channel so that it works with the Alpha Over Node?

(As a follow-up to this question) I'm trying to overlay a a green-screen plate over a 3D background. I create the key with a Keying node and the overlay with an Alpha Over node. I can get a clean key ...
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2answers
1k views

Why should I never ever use “Convert Premul” on Cycles renders?

On this question, When trying to overlay images using Alpha Over for green screen work , I used premultiply Alpha, it was the only option that would give me clean key without the background bleeding ...
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3answers
26k 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 ...
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1answer
97 views

Rendering scene background in only some frames of an animation

Is there any way to render a specific scene, say the background, during only the second half of an animation while the foreground renders the entire time? For example in a 100 frame clip could I get ...
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1answer
66 views

Why can't I use put Render Layers in a node group? (Compositor)

When I try to create a node group that includes the Render Layers node, I get an error saying it can't create a group with that node. Is there a reason why or some way around it? I don't want to have ...
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1answer
1k views

How to crop image based on Alpha in Compositor?

I wonder if there is any way to crop a image based on alpha data like this: The reason I want to do this is that I want to crop the White area of another image (of the same dimension to the Alpha ...
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1answer
8 views

Show addon tab panel in just the Compositor, not in Shader Editor

How can I only place the panel in the compositor NOT the shader editor as doing bl_space_type = 'NODE_EDITOR' doesn't specify a specific node editor and places it ...
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1answer
264 views

How to get glare on “Quick Smoke” (Fire & Smoke explosion)

I have this question that relates to Blenders Quick Smoke tool. Recently I have been rendering CGI explosions and smoke assets to be keyed in later on a short film, but I have this small problem that ...
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0answers
24 views

Why Does This Break The Viewer?

I need to be able to use a single value to affect an image in compositing. it seems like the simplest thing the compositor should be able to do but I have no idea how. whenever i attach a node giving ...
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1answer
105 views

AVI Composite Export

I wanted to increase the brightness/contrast of an AVI video I have. What I did was go to the compositer, load the video file in the Movie Clip node, fixed what I wanted to fix but: The quality of ...

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