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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How do I stop the Compositor Output Node from overwriting my images on each new render?

Using the compositor node setup above, when I hit F12, it makes a new pass and the rendered images are automatically saved. The problem is that the new render erases the previous one that was saved in ...
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1answer
561 views

Blender Glossy Direct render pass

I was thinking that I know very well Cycles Render passes, but not. Can someone explain Me (I was searching on web, but with no success), why Glossy direct pass is taking texture into consideration? ...
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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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0answers
30 views

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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1answer
120 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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0answers
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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29 views

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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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 ...
5
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1answer
1k views

2.80 - use Eevee and Cycles together for motion blur issue

I have one question about one problem in my experiment with motion blur in Eevee. I know that in this time is not supported and maybe will be supported in future official release as another primary ...
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1answer
91 views

Animation sequence Render Layers + OpenExr

i am trying to render multiple renderPasses, which i know how to do In a sequence, which i know how to do, using MultilayerOpenEXR which i know how to use. But togetger it just aint working. What ...
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0answers
24 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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0answers
37 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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1answer
105 views

How to disable vector pass calculating on unwanted frames?

I have an Internal Render animation more then 2000 frames and for 150 frames there is some postcomposed vector blur. All is good, except that calculating of vector pass taking about 10 seconds. So to ...
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0answers
38 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
1k views

how to render multiple things separately

I'm using Blender 2.80. I have a scene, where I fire 20 cannons at the same time, with smoke and fire. How can I render (with Eevee render) some cannons separatley? (i.stack.imgur.com/lXFuK.png)
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1answer
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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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0answers
24 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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0answers
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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0answers
70 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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0answers
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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1answer
924 views

How can I render albedo pass (color without shadow)?

I have tried to follow these instructions but I am not able to recreate the steps in blender 2.8. I have asked this question before and one of the steps was to set the "diffuse" setting to &...
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0answers
24 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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1answer
99 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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0answers
37 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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0answers
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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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0answers
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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1answer
1k views

Blender 2.8+ set pass index for object?

I am aware that in the Data API region I can locate the objects and set their object pass index but it is a fairly tedious exercise. Is there an easier way?
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2answers
382 views

How to output deep data?

Is there a way to export world position pass, also object position pass (local), and deep pass ? I have searched in the output tab but haven't found anything. thanks a lot!
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0answers
62 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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0answers
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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0answers
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 ...
0
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1answer
26 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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0answers
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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 ...
0
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1answer
129 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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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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2answers
525 views

In Blender 2.8 how do I render the world once for all view layers?

I have a setup where I have one collection that is a background and one that is silhouetted against it. Each of these is in it's own View Layer. The background one rendered straight, the foreground ...
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1answer
120 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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0answers
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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0answers
112 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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0answers
54 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 <...
3
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4answers
2k views

White Noise in Blender Z Pass with alpha value in Mix Shader

I am trying to get the depth value using z pass from my scene which is a simple head model, but while rendering there is white salt and pepper noise in the hair and eyelash. I have saved in both png ...
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0answers
67 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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0answers
59 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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1answer
93 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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0answers
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
187 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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2answers
2k views

Cryptomatte doesnt output nice clean edges

Is there any way i can have cleaner edges out of the cryptomatte image output ? The outline is just not clean enough.
5
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1answer
3k views

Difference between a mist pass and a normalized z-buffer?

In Cycles there are two different render passes which seem to give some kind of depth information: the Mist pass and the Z-Buffer pass. I know that the z-buffer gives the actual distance (thus ...