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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67 views

Get number of samples in rendered image

For a Cycles render, how can I know the number of samples in the rendered image? Normally, I would go to the "Render Properties" tab and look at the number of samples there. I am now trying out a ...
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1answer
162 views

Incorrect Vector Pass output (No Alpha & Zero Values)

I am looking to render the vector pass in a OpenExr format with all channels. I have rendered on both 2.7 and 2.8 and the generated images have an empty alpha channel. The compositor is set as follows:...
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64 views

Partial video blurring using nodes only

Youtube video I am loosely following: Face Blur with Motion Tracking How can I use nodes (except render layer node) to blur part of a video that uses tracked markers from movie clip editor? I want ...
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1answer
34 views

interaction of footage in 3D scene

Any Ideas on how to make Gloss and Transmission interact with the footage ? I tried modeling those items on the footage but the camera wasn't matched perfectly. So any chance on doing the trick on ...
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1answer
101 views

How to load and assign an image to a specific image node in the compositor?

Background: I am importing (appending) a new scene to an existing .blend file. The new scene has only compositing nodes and is only used for compositing renders created by the original scene. What I ...
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1answer
46 views

How to make a “soft-textured emission” (example provided)

I'm trying to copy this So far I've got this My material nodes look like this Material Nodes (yellow cube material is the same, just new colour) My Composite nodes look like this Compositing Nodes ...
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22 views

How to assign a file to a specific image compositor node? [duplicate]

Perhaps the right way to do this is to select the node first then: ...
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16 views

Freestyle not rendered only when rendering from command line

My freestyle works well when rendering in Blender by pressing F12: But when I render the exact image from command line with ...
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19 views

Matching moving set extensions

I've been doing Blender for about 3 months now and I'm trying to learn how to match move a set extension of a sky for one of the scenes I'm working on at the moment. Is there a way to do this in ...
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1answer
159 views

White lines appearing when rendering shadows to separate layer and recombining in compositor

I have trawled forums for ages looking for a possible answer to this. I am trying to render shadows to a separate layer then recombining them in the compositor with the rest of the image. This is ...
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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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27 views

Techniques to composite geometry and volumetrics together for an animation

Hello everyone I hope you are hanging in there! I spent about 2 hours trying to figure this out with Stack and YouTube but still can't wrap my head around this. The scene below will eventually ...
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603 views

Denoising in Blender results in a black screen (Render layer node is connected)? [closed]

So I've seen a lot of people complain about their experience using the compositor. Usually people forget to actually connect render layers to the output. However, I have not forgotten this, yet it ...
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2answers
99 views

How do I add together two a⨯a images to a single 2a⨯a image in the compositor?

I've tried using the translate node to move each image a/2 px left or right, but it cuts off the image. To illustrate, here's an image:
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169 views

Why does my render smudge?

Hey everyone, new to blender. Learning the best I can. Just practising some sun light with cycles render. My renders are coming out smudgy, all detail lost. All of the render settings are normal, ...
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1answer
2k views

How to properly connect the Denoise node in Compositor?

After enabling Denoising Data pass, there are now two image outputs: Image Noisy Image Which should I use with the Denoise node? Blender Manual doesn't cover it.
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19 views

Masking on another render layer

I've been trying to 'purify' a fog glow, i.e. render it all of one color. Simply put, the fog glow will cause anything to light up with the surface of the color. Fixing that is simple enough, by ...
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22 views

Incorrect white background in compositing [duplicate]

Really straight forward question here, basically I have a few doors I want to render with an alpha layer and a shadow catcher, then I want to use the compositor to add in a PURE white background ( HEX:...
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25 views

How to merge multiple BW ID masks into single one?

I'm creating a synthetic images dataset to be used in a machine learning project. For each of the objects in the scene, while rendering, I need to output a BW mask highlighting the position of the ...
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1answer
204 views

Only one object has bloom when Z combining

I have some trouble in the compositor and I need help. I made this super simple scene to demonstrate the problem: Then what I did is render out the cube and the sphere separately into two images with ...
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35 views

Discrepancy between 'Hue Saturation Value' node behaviour in 'Shader Editor' and 'Compositor'

I want to generate random color patterns, to do so, in the 'Shader Editor' I do: Add 'Image Texture' node and select an image Add 'Hue Saturation Value' node and connect output of 'Image Texture' to '...
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1answer
138 views

How can I control node values without input inside a group node?

I have created the node group, but I can't control the values inside.
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25 views

scene ignores the object in render however view port doesn't?

i wanted to make a gun being showcased using motion tracking in Blender. However after i ran a test render i realized the object wasn't even visible so here i am to ask what the problem could be, im ...
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16 views

Skip hardware expensive nodes the inside node group with “switch node” (compositor)

I have some expensive nodes groups inside the node. There is no problem if I use this node only once in the node tree but as node is designed to be used multiple times I would like to have an option ...
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1answer
84 views

How does Blender know whether to use compositor output or 3D scene output

So, I am working on a project and experimenting with Blender 2.8. Correct me if I'm wrong, there are multiple outputs, VSE, compositor, 3D scene etc. How does Blender know which to use? Are they ...
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1answer
165 views

How to programmatically add objects into cryptomatte node?

How to automatically add object to Matte objects? Right now I have to use Pick output of Cryptomatte and then use eyedropper to add all the objects I need. Ideally, I would like to have a mapping: ...
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1answer
77 views

Hiding node group input (compositor)

To compact my node (it will allow to add more adjustments) I would like to hide unused inputs. With dropdown list I could unhide chosen adjustment. That would be awesome if unhided adjustment will be ...
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22 views

How to Add objects on Video? [duplicate]

I made a real-life doodle with a grease pencil and I want to add a grease pencil object on the video. I use alpha over in compositor but it doesn't work!
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59 views

“Buffer Groups” in compositor does not work

In compositor performance options you can enable "Buffer Groups". According to manual this "enables buffering of group nodes to increase the speed at the cost of more memory". I guess this means: If I ...
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61 views

Properly control compositor's output file names when using command line rendering

My compositor looks like: It's simply two render layers, rendered to two separate files. But when I run: blender -b test.blend -E BLENDER_EEVEE -f 1 It ...
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1answer
220 views

Combining denoise node with other nodes in compositor?

I'm rendering a thing in cycles and I think I put the Intel denoise node in the wrong spot, because it won't mix with the rest of my nodes in the composite. I've been using Blender for a couple of ...
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40 views

Is there a way to adjust Vibrance in the compositor?

There is of course a node that deals with saturation but I'm not finding anything for vibrance values like in Photoshop which I find a bit more useful. This would be a very helpful thing to include in ...
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50 views

The output isn't updated by the changes in the compositing node tree with python script

I am new to blender scripting. I found that the changes in compositing node tree are not updated until the compositor nodes editor is shown on the window. I want to output the rendered RGB image and ...
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2answers
139 views

How to render some of view layers only (instead of single or all of them)

I have LOTS of View Layers (generated in Python), and I only want to render and composite several of them at once. When I checked "Render Single Layer" in View Layer options, only the active one in ...
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1answer
31 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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29 views

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
451 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
54 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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27 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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0answers
64 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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47 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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2answers
356 views

Some pixels doesn't render on the image ID MASK

LOOK FOR BOX TYPE IMAGES I need to annotate each SINGLE plant separately from others, for accurate annotation, right now I've it scripted for ID MASK. It gives each object from a specifically named ...
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31 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
415 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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59 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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18 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
62 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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17 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
682 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
137 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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