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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21 views

Why shadow catcher effect is messy in Bender?

i am new to Blender , i render text object with shadow catcher , but fount it was so messy compared to the one without shadow catcher Here is the original complete one Here is the one with shadow ...
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17 views

Is there a way to control cryptomatte colors? for object colors for instance masking out of the box in blender

Is there a way to know each color of each object before it will be rendered? Or a way to setup colors for each object. In other words I need to setup a preseted color for each object on the scene. ...
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35 views

Blender animation FileOutput saves wrong image

I have designed a stackable wine rack and need to take renders of it from 6 different angles for marketing. There are 8 coloured versions of the rack so I have a scene with 16 different view layers. ...
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1answer
40 views

Compositor - File Output - PNG compression ratio issue

I use the compositor to save my renders into files with the "File Output" node. I want to have the smallest file size while preserving all information. I use PNG file format with the highest ...
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20 views

How can I change the camera resolution without changing the image resolution? [closed]

I am trying to do a composited photo with a model but I wanted to change the camera's resolution to that of the image. but when I tried to do exactly that, the image resolution changes too. Is there ...
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1answer
68 views

How to output multiple images from Blender's compositor with Python?

I know how to render one image via Python and get an output with Blender's compositor. What if I need it to render 100 images for me with numerical names e.g: img_1...
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1answer
13 views

Getting interstitial compositor frames when using frame step

I'm trying for a really jittery stop-motion like effect by using frame step to render on the twos (or threes, or fours). Rendering this normally and getting a video file out makes the frames happen at ...
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2answers
45 views

How to increase glare strength of just emission map?

I am trying to create a bloom effect around my emission map using the glare node in compositing. The problem is that my emission map isn't bright enough for this to work. I don't want to increase the ...
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16 views

Why my animation render is getting greyish?

I rendered the animation on Blender video editor as FFmpeg, H.264 and Quicktime. Previously I had rendered the same animation and only the last frames were colored right, but once I rendered again it ...
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1answer
131 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
21 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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29 views

EEVEE Color pass with AO

I found this amazing NPR Shading project. When I download the project and just render it in EEVEE it looks great, and I want to recreate this in my own project. I ONLY need to render the flat ...
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19 views

How to composite in an object/image “seamlessly”

I have rendered a crystal that I want to "glow" but I don't want the crystal to look like it is emitting a lot of light. So I rendered one image with the whole scene including the crystal emitting no ...
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1answer
20 views

How does the compositor interact with the 3d viewer? (Chroma keying movies as planes)

I am still new to Blender. I included movies with green screen on planes and am trying to chroma key them so they aren't green boxes moving around in 3d viewer. I know how to chroma key in compositor ...
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46 views

Cryptomatte Boundary Artifacts?

I got Boundary Artifacts while using Cryptomatte. I wrote a question on the same topic, and I read a comment that low resolutions could be an issue, and added a resolution perspective to write more ...
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1answer
92 views

Anti-aliasing of ID Mask is more coarse than Cryptomatte

The edges of the Cryptomatte are smooth, but the edges of the ID Mask are rough even if the anti-aliasing option is checked. The anti-aliasing option of ID Mask seems to have a very small difference ...
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56 views

I get border artifacts when using Cryptomatte or ID Mask

I tested masking in the Blender compositor. Please see the GIF below. The 1st to 3rd outputs are Crptomattes(obj, mat, asset) and the 4th to 5th outputs are ID Masks(obj, mat). All mattes have border ...
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1answer
29 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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11 views

Eyebrow rendering Eevee for animation

In eevee rendering mode, I have successfully rendered eyebrow on top of a character's face when the front is facing the camera using "alpha over" node. But, eyebrow would still show up even when ...
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1answer
40 views

Compositing Viewer Node No Background

No preview image showing up when I plug the Viewer node in. I read elsewhere that I needed to render the image first. That worked for a little while but now it doesn't work anymore.
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1answer
41 views

Cropping background image when rendering region

I have this scene with a hand and a knife and I want to get an animation of blood sorta dripping (spraying) from it, but because of SSS I use in palm material it takes forever to render (over 4 ...
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0answers
39 views

How to get the segmentation mask of an internal object?

I am trying to render the internal cube on top of the external cube in a segmentation mask, similar to the drawing below (please excuse my bad drawing). I've assigned pass indexes to my materials, ...
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42 views

Neutralising a photos lighting by using a rebuilt scene to imitate the original light and using that as a counterbalance

I have this picture and I've recreated the scene (in its entirety, including off screen objects) in a bid to remove the lighting (sunlight coming through windows). So i created a sun lamp and tried to ...
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1answer
44 views

How to exclude passes from EXR file when using the denoiser node?

Situation: Blender: 2.81a, Cycles 1 Scene, 1 View layer View layer passes: Combined, Normal, Diffuse Color, Emission Using the Normal and Diffuse Color as inputs to the denoiser. Denoiser outputs ...
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3answers
114 views

Save/Export image from compositing tab in Blender 2.81

Any way to save the pre-rendered picture as JPG/PNG from the compositor?
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1answer
21 views

Is it possible (plugin?) to use a camera input (solidview or materialview) in the compositor as a preview?

While in the compositor, the usual input is the renderlayer, but when compositing, mostly when checking masks or rotoscoping, having a simple preview instead of a final render as an input is quite ...
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1answer
15 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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21 views

How to separate environment in Compositor without black cutouts

Nice people of Blender SE. I'm using Compositor to blur my HDRi (as suggested by others on BSE). Cycles render engine. However, the environment behind objects isn't rendered, there's just a black ...
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27 views

Pre-determined Color Palette in Render

Are there any existing methods to reduce a render to a specific set of predetermined / indexed colors within Blender (ideally with optional Floyd-Steinberg dithering) ? I've been digging, I can't ...
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1answer
25 views

How can I render a composition(s) from the command line? [duplicate]

I've never used the python console before so I only know these commands from the documentation that I've looked up. But I've read that it can be a lot faster than just pressing ctrl+F12 because it ...
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1answer
53 views

How to upscale final render (compositing)

I am working on retro style graphics. How do I upscale my final render through compositor? I'm rendering frames with 480x270 resolution and want to upscale it to 1920x1080 without interpolation (or ...
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2answers
31 views

Rendering: Excluding a layer while keeping it's influence (Masking?) [duplicate]

I am making this Christmas Tree but the problem is that I can't render the whole scene in one go because of too many particles. So I have rendered my tree and now I want to render only tinsels wrapped ...
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19 views

Smooth stepping while compositing

I'm new to Blender's Video editing and was trying to cut a piece of music into a loop when I realized that Blender's compositor doesn't let me move the audio clip without 1 frame step, or change the ...
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1answer
205 views

Transparency of whole image at the position of an object

Is there a material or render setting which makes the whole rendered image transparent at the spot of an object? I.e. not to create only a transparent object where the background is visible, but a ...
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1answer
25 views

Blender Camera Tracking ground plane - unable to adjust shadow darkness

Hello fellow Blender users, I am having a slight issue with my shadow catcher ground plane when I am doing a Camera Tracking and recomposing my 3D data with the Camera Footage. The ground plane (...
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12 views

Reduction of total render time by alpha masking?

A newbie‘s question: I like to model a train passing through a landscape. The camera is static. Rather than to render the full scene video, there is the idea to render a) the static landscape only as ...
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1answer
22 views

How to Render Composite layers for timeline video creation

Hi and thanks in advance! I followed the tut to make a planet using Blender 2.8.1.16, https://www.youtube.com/watch?v=oUNfPavsViY which resulted in an image containing 2 layers, Planet and Atmosphere....
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33 views

How to get luminance value of every pixel from the rendered image?

This link below shows how to get value of RGB color and z-depth from viewer node, that corresponding to the value on the pixel information bar (figure below). Link : How to get Color and Z-Depth from ...
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1answer
103 views

How to save render layers for later use

This is probably a silly question, but I'm struggling with it. When I close Blender and open it up again I now have to re-render the scene to be able to use them again in the compositor. I have read ...
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23 views

How to put an sRGB image on top of a filmic render in the compositor while retaining their own sRGB-colors? [duplicate]

When I put an half-transparent sRGB image on top of a filmic render in the compositor, the transparent image will take the color-modus of the render (filmic in this case). Is there a way to keep the ...
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10 views

I can't get nodes to work, wondering if it's a glitch or I'm doing something wrong

I can get nodes in Blender to display the image/movie clip I'm trying to display in the backdrop and it plays when I press the play button, but there's no sound and it doesn't display in the preview. ...
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2answers
104 views

Cryptomatte Pick isn't working. What have I forgotten?

Blender 2.81, 2.81a Windows 10, 2xGTX1080 GPUs, GPU rendering I've been through the Manual and a few tutorials, but I guess I'm missing something. Why can't I get the Cryptomatte Pick working? Is ...
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5 views

Mask in compositing workspace makes video B&W

So, I've never really gotten masking in the compositing workspace and, I need to use it so, why when I add a mask onto a video, does it turn the video black and white? Check out the screenshot.
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20 views

Child object on different render layer?

I'm learning about compositing from an old pre-2.8x tutorial. The tutorial shows that an object parented to another object can be moved to a different view layer, which is then used by render layer to ...
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How to capture Depth data of smoke

So me and a few people we going to do something for a competition and for my part in this I need you get the smoke and objects depth data. So how should I do this?
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27 views

Why does alpha channel influence the color channel in node compositor?

I'm trying to swizzle an image using the compositor to generate a texture for a game. As you may know, it is common in Game Dev to have a different image per channel to optimise the texture loading ...
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2answers
34 views

How to achieve a “Photorealistic Camera”

I’m looking to recreate the same look that the Vray Renderer can make. Specifically with the RGB Split. I’ve tried using the Lens Distortion Node from the compositor and slightly upping the dispersion ...
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1answer
36 views

Viewer Node doesn't show up

So I am watching a tutorial and I am supposed to create a viewer node to connect it with a fresnel. I searched through the internet and everyone is saying that I only have to press Shift + Ctrl + LMB ...
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23 views

Can I render one layer with perspective camera and other layer with ortographic and compose both?

I have two layers: one has to be rendered with orthographic camera in order to not mess with proportions of objects and other layer has to be rendered with perspective camera. Any way to achieve this? ...
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1answer
36 views

How to change a specific colour in an image

I have an image with 3 colours I wan to take them out and change lets say blue to a different color I have image 3 colours Red, Green, and Blue. I want to turn Blue into a different colour. Current ...

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