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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1answer
17 views

Cannot see Texture and Shader option in Compositor

I am new to blender. I saw in the tutorials to add shader and texture but don't seem to find any such thing after pressing shift + a.
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How to add image processing to compositor workflows

I'm looking for a way to add image processing to the compositor in Blender 2.8 or later. I'd like to use either a python script or an external program to process images as part of a compositor ...
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2answers
20 views

Alpha-Over Node Not Working

This is my composite setup. From all tutorials, wikis, etc, this should place the movie clip in the background and the wall/thing in the foreground. Does anyone have any idea what I'm doing wrong?
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2answers
15 views

Make objects reflect from separate view layer 2.8

My last post of this was marked as a duplicate for glass shaders. I want to make explicitly clear, I am NOT asking for glass shaders. I'm doing a bit of archviz for a buddy's bathroom remodel, and I ...
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13 views

Make light pass through plane in cycles

I'm doing a bit of archviz for a buddy's bathroom remodel, and I want the windows and reflective surfaces to show a background without it darkening the scene. I think in 2.79 you could set the object ...
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11 views

Find out Сompositor node tree active output (Python)

Let's say for some reason I have 5 "Composite" nodes in Compositor. How can I find out through API which one of them is active render output? ...
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15 views

How to access render result pixels from python script

I am trying to do what a lot of people here already asked before. I want to have a pixel array from a renderer output directly in python, without saving it to the disc first or changing the source ...
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1answer
45 views

Some pixels doesn't render on the image

Blender doesn't render all pixels on distant objects, it gets better when I make resolution higher, like 4k, but it doesnt fixes my problem, but makes image pixels better. Also raising sample doesnt ...
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0answers
13 views

How to make one only object have motion blur?

I'm trying to make a lightsaber effect, where the blade has motion blur but nothing else in the scene does. How would I do this? Checking off motion blur applies it to all things in the scene. I only ...
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2answers
39 views

is there a way to automate render file names and avoid accidental overwrites?

is there a way to automate render file names and avoid accidental overwrites? E.G. add timestamp to filename? I find my workflow involves many fast test renders, and it drives me nuts that for each ...
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7 views

Overscan in the compositor

In our VFX workflow, we are matchmoving shots in Blender and also calculating lens distortion in Blender with the Camera Solver. To get the distortion data over to our compositing app we are ...
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17 views

Compositing Single image shot with custom duration

Good day to all! I try to insert single image still shot, with custom duration and in/out time in my compositor animation and dont understand how simple to do (currently i use animated alpha for show ...
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1answer
33 views

Correcting levels in dark renders

I've been experimenting with Blender for a while and am starting to get things looking how I want, but the renders are coming out too dark. What's supposed to be white is coming out as light grey. ...
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10 views

Renderman .exr to blender composit AOV's only red channels

I have an .exr rendered with blender and I like to test the intel denoiser on it in blender. But when I load the .exr the beauty is fine but all the AOV's only show the red channel. When I load the ...
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1answer
110 views

Is chromatic aberration possible in blender

Can I separate individual colors of an image/video and add another color around it in other position to achieve chromatic aberration
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2answers
42 views

Show time of day in render

I am using the lighting sun position add-on in Blender 2.82 to render an animation. I want the viewer of this animation to see on which time it is. I only want the hours to show. So it should be a ...
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0answers
15 views

The vector pass looks strange when viewed from the render layers node to the viewer node

Image 1 shows the vector pass of the render layers node directly checked by the viewer node. The image looks strange. In image 2, the vector pass is outputted to openEXR through the file output ...
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Why do animations taker longer? (Animation Renders vs Single Image)

I am rendering a BUNCH of product images. Same shape different texture. I have my material set up in nodes to sequence through image textures each frame. Render quality is 512 (no I can't set it lower ...
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0answers
45 views

Cryptomatte is showing the same color for different materials?

I am using cryptomatte. That mostly works fine for me but I found it uncomfortable sometimes. As you all know, the pick color of Cryptomatte depends on the name of the material. The problem is that ...
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39 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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0answers
21 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
49 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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1answer
97 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
16 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
51 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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17 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
149 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
27 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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0answers
31 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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0answers
22 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
21 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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0answers
50 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
118 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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0answers
61 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
41 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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14 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
56 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
58 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
56 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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0answers
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
56 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
207 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
23 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
18 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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0answers
22 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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0answers
30 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
30 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
69 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
32 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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