Questions tagged [render-passes]

(Render) Passes can be used to split rendered images into colors, direct and indirect light to edit them individually, and also to extract data such as depth or normals. Use this tag for questions concerning the use of render passes.

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Mist pass gives white edges

Utilizing the Mist pass in the Compositer I get white edges on objects. Why is it, I always thought that the Mist merely defines black to white color depending on distance and nothing more?
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32 views

Does my EXR have everything I need for compositing?

The blender stack exchange community has been super helpful for my project and I will certainly try to give back to other users whenever I can. I'm ready to export my sequence to OpenEXR Multilayer to ...
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My Smoke simulation has this buggy blocky shadow

I have been tackling this problem for the last 2 days and I can't find any solution to it. So, I baked this smoke sim and test rendered it, It has some weird blocky shadow and reflection, I thought it ...
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23 views

Eevee diffuse pass render bug?

I hope this is the right place to post this. To see the "bug", please go directly to the observation part. The setup We need to export the diffuse pass render in low resolution of a scene, ...
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34 views

Save UV pass of specific object to file for later modification of texture

beginner here. I want to save my rendered images together with auxiliary data that can later be used outside of blender. Specifically, I want to change the texture of a simple object (say, a cube or a ...
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30 views

Open EXR file not getting generated in certain cases

I am trying to generate an OpenEXR file based on the following procedure : Getting the depth of every pixel to the center of projection of the camera in Blender I have tried to create a simple scene ...
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1answer
32 views

Ideas on: Realtime Mist Pass via Shading Nodes? [duplicate]

Wouldn't it somehow have to be possible to get a depth gradient into one's material nodes? This way you could have a realtime mist pass in the viewport (like in the picture). I guess one would need ...
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23 views

Reflection capture of emissive objects

Im in Blender 2.93 I have a tracked scene, the background is a PNG image sequence, and I've created a particle system that is made up of emissive icospheres. I would like the icospheres to cast light ...
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17 views

Load Shader AOV passes from one blend file to another

Is there a way to load the Shader AOV passes from one blend file to another? I noticed that when linking blend files the AOV material node comes along but the Shader AOV list is empty, so I was ...
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67 views

Access to Render Passes with Python

I need to save both the 'Combined' pass and the 'indexOB' pass. Is there a simple way to use it with Python? I set the path to save my render - ...
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17 views

How do I render out separate passes to be comped in After Effects? [duplicate]

The passes I'll need are: Alpha RGB Colour Reflection Specular Ambient Occlusion Shadow Cycles or Eevee, doesn't matter, but they'll need to be rendered out to be used in a different program (not ...
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29 views

Is there any way to not overwrite when I re-render ? Without changing the prefix everytime manually?

I just want to output new renders every time i render rather than those previous one being overwritten - again, without changing the prefix itself ! So eg : Render001-Normal becomes Render002-normal ...
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22 views

Getting Vector pass output for gas simulation

As mentioned in the title, I'm trying to get the vector pass output for a gas simulation. I have a partial solution by doing the following: Bake the gas simulation with OpenVDB cache format Add the ...
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96 views

Can't save a single pass from an OpenEXR MutiLayer file

So, I'll try to make it as clear as possible but I just started working with OpenEXR MultiLayer Output and I might miss some important info. Important to know I render with Cycles. I'm working with an ...
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36 views

Cycles — Non-translucent glass in compositing passes — Problem

I have a scene that is obscured by a glass plane that has displacement. The glass curves/bends all the objects that are behind it. << This effect is crucial here. When I render a scene with ...
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Viewport Shading vs Render - height offset / discrepancy - Eevee

I have shader that calculate color based on height. I have exact same shader setup in Unity and when I'm comparing results - Unity shader and Blender Viewport Shading giving me matching result. ...
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24 views

Transparency missing from Mist Pass

As the title says, when I render out a Mist pass, all transparent surfaces appear opaque instead of transparent. So if I have a glass door and there's a room behind that door, in the mist pass I won't ...
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60 views

Can I use Mist pass as a Z-depth for post-processing?

I am creating an animated scene with a static camera. And I'm wondering... Can I use a mist pass instead of Z-depth? I find it kinda easier to set up, it almost never needs normalization and it is ...
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19 views

Not rendering properly

hello. I am new to blender. I created this donut. I applied a creamy material to the donut. But in rendering it is not rendering correctly and the donut material is white+light blue instead of cream. ...
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17 views

How to change background color in diffuse color render pass? [duplicate]

I looked around and seems like its not possible according to another post. As a workaround, i'm using a bunch of white images to act as the background color change. Any way to change the black color ...
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44 views

Index OB not working in composite

I´m quite sure this is a error on my side but I just cant figure it out. I´ve been playing around with the Object Pass Index and used it to create images where every object has a different shade of ...
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1answer
123 views

World Space Ambient Occlusion

Gotta question about Eevee rendering. Normally, Eevee uses screen space ambient occlusion and screen space stuff obviously generates lots of artifacts, like the one on the picture, where the occlusion ...
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1answer
116 views

How to make diffuse render pass have transparent background?

I have a 3D object that I want to render into separate diffuse, normal & AO maps for use as textures. I am using the View Layer Properties > Passes options to include these layers in the output ...
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22 views

One of my objects won't show in my F12 or final render [duplicate]

I've tried to render my scene but there's an object that won't show up. I've checked the camera, I've checked the visibility, it isn't hidden and it's showing in the viewport. I feel like I've opened ...
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2answers
51 views

Object won't show in render. None of the suggested solves I've found have helped

I've tried to render my scene but there's an object that won't show up. I've checked the camera, I've checked the visibility, it isn't hidden and it's showing in the viewport. I feel like I've opened ...
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107 views

How do you get 2 render layers from an exr file?

I am compositing a scene with 2 render layers. I saved it as an image sequence of EXR files so that I can close the program. However, after compositing, the Exr doesnt keep data from separate render ...
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53 views

Is there a way to auto name my AOV outputs?

So in most other software I use like Houdini and C4D there are tokens you can use to assign auto naming conventions such as the $ (dollar sign) expression. In C4D <...
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1answer
112 views

Image plane is not visible through glass

I have an image-sequence as a plane imported to Blender in cycles. I used a "Shrinkwrap" modifier to wrap it on the Body. When I now put the glass helmet on the character the image plane is ...
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1answer
25 views

I want to remove one object from my render so that it leaves just a transparent background

I want to remove the pool water from my image, so that there is only a transparent background, so that I can add the pool I rendered in luxcore in photoshop. Right now, because I could not get it to ...
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2answers
33 views

How to enable other passes on background layer?

Here's what my compositor shows when I have shadow pass enabled. How do I enable it for the background layer as well?
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66 views

How do you render a shadow pass from a shadow catcher in cycles?

I have an object (an apple). I've covered it in water droplets using hair particles (from a second hidden emitter). I only want to render out the droplets and their shadows. I've set the apple to be a ...
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58 views

Render Passes File Output in Headless Mode

Here is the blender manual on command line rendering: https://docs.blender.org/manual/en/latest/advanced/command_line/render.html I am having an issue in blender where blender hangs on rendering in UI ...
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38 views

Unit of the color in of the Diffuse Direct/Indirect passes in Cycles render

When I read a pixel's red value 1.0 from these passes, is the value I read radiance, radiosity or irradiance? Is it 1.0 W/m^2 or 1.0 W/(m^2sr)? My understanding is that a sensor is sensitive to ...
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1answer
183 views

Composite two renders into one image

I am looking to produce an image like this: Where there are two objects, with one object casting a shadow on the second object. The catch is that I do not want to create this by rendering two objects ...
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1answer
91 views

Depth of Field and Depth Pass problem

I seem to be having some trouble getting the look I need from DOF. Below is a render I did with DOF enabled: At first, everything looks fine, but, the corners of the glass box is also blurring, which ...
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271 views

Mist pass looks noisy

I have a following problem: when I render my final image with mist pass, the mist pass itself becomes noisy, see in these images: Mist pass combined in image: Mist Pass itself: Could the problem be ...
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31 views

Transparency from shader becomes white when exporting on transparent background [duplicate]

So first time actually posting a question here, but I just can't seem to find a solution. So I made this fire ramp shader for a project I'm working on, and I want to have a transparent background for ...
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1answer
90 views

Why does ambient occlusion make a black area above emission object?

I did AO in compositor. The body of an emission object is invisible to the camera. First screenshot - with TURNED ON AO Second screenshot - with TURNED OFF AO How it works and how i can keep AO turned ...
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1answer
116 views

Artifacts in render preview after adding emission/volume scatter shader to world output volume

I am following a sword tutorial and when i try to plug in either a Emission shader or Volume Scatter shader in to the world output volume node weird overexposure and artifacts appear in the render ...
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1answer
686 views

How create perfect mask using ID Pass ( "clown pass" in Photoshop)?

Has anyone looked at the tutorial? regular ID Pass so that later in Photoshop it will be easier to select the necessary objects. But what I don't understand is that even if you have this ID Pass (...
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1answer
300 views

Automatic AOV shader pass setup for geometry buffer

Is there a way to create AOVs that affects all materials in the scene? I can successfully create an AOV shader pass that outputs world positions of the object material is on: This gives me correct ...
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85 views

Can I render different passes into different folder automatically?

I have a file output node rendering different passes into a single folder (circled in pink). I have set up folders for different passes (circled in yellow) and I want to set blender to automatically ...
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1answer
47 views

Blender Output Multiple Passes When Rendering with Specific Naming Scheme (2.8.2a)

My render setup looks like this: and my file output looks like this (the mist pass is put in that folder with the names "Image0000.png" and "Image0001.png"): but my desired ...
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39 views

What are Multipass and crypto mattes?

I have animated a character with texture. I want to composite / integrate it into my reallife footage. I have heard about multipass compositing is it possible to get different passes rendered from ...
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61 views

How do I create transparent, 8bit shadows for further use in Photoshop?

I'm struggling with a problem. I created a simple scene in Blender: As you probably guess, I want to use that scene to create a mockup in Photoshop. The goal is to have a separate shadow that will ...
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1answer
749 views

Save PSD (or TIFF) with passes as layers? [duplicate]

I wonder if there is any way in Blender for saving render results in PSD (from what I can see it is not supported) or TIFF file with layers from passes (for example refletion pass, object id, material ...
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1answer
160 views

Return a list of activated render passes for view layers?

I'm trying to get a list of currently activated render passes for a view layer. For a scene 'Scene' and a view layer labelled 'my_vl', I can query individual pass status by returning True or False (e....
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76 views

How to keep only Reflections and Shadows but object itself invisible

I want to render only: Object On the white table Table surface reflections Object Shadows on table Emission particles reflections & gloss on table I want White Table is to disappear totally It ...
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340 views

How do I render a normal pass that is blue/pink instead of red/green?

In my case, it's for an aesthetic purpose. I want to render out a version of my scene that has the blue/pink normal map look. Blender's standard Normal render pass seems to be red and green. I'm sure ...