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
14 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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9 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
33 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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24 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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24 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
41 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 ...
2
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1answer
39 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
62 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
14 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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19 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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22 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
23 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
39 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
29 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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18 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 ...
3
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1answer
187 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
23 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
20 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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0answers
32 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
95 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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0answers
22 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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0answers
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
56 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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0answers
4 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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17 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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0answers
13 views

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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19 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
29 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
27 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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0answers
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
28 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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6 views

scene and camera tracking

how can get the same set up scene and layers that I get automatically with "set background" and "set track scene" in camera tracking? I try to explain better: when you use tracking point in Movie ...
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0answers
8 views

Compositing: Ho to scale compositing results to different image sizes?

I have a compositing and would like to save the image result to individual files by using different image sizes. Currently I only know the end size of an composting result is based in the scene ...
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1answer
64 views

Video editing: weird transparency blending with “Alpha Over”

I'm working on a video in the sequencer, and as part of this I want to overlay a scene containing some text. The text is rendered via node-based shading, and in particular uses a "clouds" texture to ...
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1answer
30 views

How to re-render specific view layers (2.80)?

I have a scene split into several view layers. they are rendered separately and then put together in the compositor. I would like to re-render only some specific view layers, not all of them. How can ...
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2answers
28 views

How do I properly use core matte to keep green section of shirt on using green screen keying?

I have some footage shot with a green screen and stupid me didn't pay attention to the shirt I had on which on the center of the shirt has some green. So naturally, I have a hole in my chest when ...
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1answer
29 views

Accidentally made backdrop viewer size zero. How to get it back?

I accidentally decreased the size of the viewer in the backdrop to zero. Now it displays as a small cross and I cannot reach the handles to enlarge it again. Does anyone know how to get it back, ...
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42 views

Could this kind of “inflating brain” effect be done in Blender compositor?

I would also need to adjust the strength and position of the effect.
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1answer
85 views

2.8 Can’t connect compositor nodes

having moved to Blender 2.8 I’ve gone to use the Compositor for the first time and then realised I can’t drag node connections from one node to another node. Like here… https://gph.is/g/E1qmpAD But ...
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0answers
9 views

Noisy image from fog/mist compositor?

I have an issue that I did not realise until it was too late. My rendered has too much noise created from I think the fog glow/mist_z/sun-ray compositor additions. How can I reduce the noise and ...
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0answers
10 views

What file format and setup for the “Vector Blur” node in compositing

Which file format I've to save for using vector data in a "Vector Blur" node in Blenders compositing? Currently I save the vector pass into a OpenEXR file, but the blur is always vertical and doesn't ...
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1answer
57 views

Compositor setting in Blender Internal: How to properly make a split RGB effect on further objects using Z?

I'm a blender amateur, I've learned it by myself, and I was trying to make a split RGB effect on the objects that are the further away from the camera. I tested it out with this simple scene: In the ...
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1answer
20 views

Use Multiple Image Editors in Compositor

I was looking into the compositor for the first time, but I came across something that is an issue. There seems to be no way to view multiple outputs from the node tree.Both image viewers just show ...
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0answers
18 views

How to compare 2 images to generate an alpha image

Let's say there's 2 rendering image A and B from same scene and same camera, how can I do this by compositor or script? compare image A and B turn the same part into an alpha and export to image C ...
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39 views

Can I mask objects using Cryptomatte in 2.8

I have 3 balls that are travelling down a pipe, I have a background image which I have aligned my pipe to a hole in the image. In order to make the balls appear as if they came from the hole in the ...
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0answers
24 views

How to composite shadow on different view layers?

I'm trying to learn how to do this to save on render times during animation in Blender 2.81. I want to use this on a project that will have moving characters, moving camera, etc. Everything works ...
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0answers
24 views

how to add mist in the 2.8 compositor?

I enabled the mist pass in my render settings then rendered via sheep it. however i have no mist settings on my image only a depth. and i cant seem to get the mist to appear
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0answers
35 views

How to disable word background transparency only for one View Layer on Eevee

Eevee doesn't have the Environment pass, so I'm looking for a solution to have one View Layer with the World background and another View layer with the background transparent to composite on top of ...