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Questions tagged [render-passes]

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3
votes
1answer
404 views

Convert an EXR render from scene-linear colorspace to CIE XYZ

I am making renders for research in computer vision, and need to know the CIE color space values from each render. Right now I am rendering a few different passes to an EXR Multilayer file. I ...
1
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1answer
91 views

Rendering one pass only to avoid unnecessary computations in Cycles

Using Cycles, I only need to render one pass (depth map and surface Normals) of a 3D shape in the scene. I do not need the RGB rendering at all although most of the computation is spent on rendering ...
4
votes
1answer
2k views

Understand color of Diffuse Direct/Indirect pass in Cycles render

The Blender manual page says about Diffuse direct and indirect as follows: Diffuse Direct Direct lighting from diffuse BSDFs. We define direct lighting as coming from lamps, emitting surfaces, the ...
2
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2answers
929 views

Depth in meters for rendered images

How can I get the depth in meters? I need the "real" distance from the camera to each pixel. As the next picture but each pixel values representing the distance in meters to the camera. I am ...
3
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1answer
465 views

Render Passes separately

Is there anyway to render passes other than combined separately ? I would like to render the Z pass, the mist or the normal pass separately but even if I disable the Combined pass, blender still ...
2
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2answers
177 views

Accessing Vector Pass Data in python in background mode

Background: We are building an automated pipeline to extract motion (i.e. vector pass output) from animated blends by running scripts using blender's python API. We are able to programmatically set up ...
0
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1answer
52 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 ...
4
votes
1answer
380 views

How to use the new render pass API for an external renderer?

I am developing an addon for an external renderer and want to register custom render passes. Last time I implemented this feature I had to resort to images because Blender only had hardcoded render ...
0
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1answer
269 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? ...
0
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2answers
129 views

screen composition in blender

How do I do screen composition in Blender. Cinema 4d has buffers you can render out and replace the screen with images or videos in after effects. How do I go about placing moving pictures on the ...
1
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1answer
223 views

Shadow pass - terminator problem?

BI. Simple UV sphere with smooth shading and Point lamp with raytraced shadow. Main render is correct, but Shadow Pass is blocky. Why? Split view:
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0answers
254 views

Antialias and jagged edges on Cycles passes

I want to composite different passes in Photoshop but the GlossDir pass has jagged edges. I tried to boost samples, different experiments, boost resolution (about 6000x4800) but the GlossDir every ...
1
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0answers
44 views

Does the Z pass works with OpenEXR?

the Defocus (with use Z buffer checked) works perfectly with a render layer node (tested on one frame per time). however when i rendered the whole sequence as an OpenEXR (Multilayer or not) and ...
2
votes
1answer
6k views

Volume Scatter in World makes the sky turn black [duplicate]

While using the "Volume Scatter" option in Blender the Background turns Black. (I am using Blender 2.79). Here is my issue in detail. The first image below shows a normal scene with Blue sky (Set ...
5
votes
2answers
391 views

A good way to render objects on a photo background that works also with focus-blurred margins

I'm trying to render with Cycles on a photo background using Blender Guru's compositor nodes: [ Here, the foreground objects are obId=1 and are on layer 1 (rendered in RenderLayer); reconstructed ...
2
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0answers
72 views

Is it possible to control cycles mist pass height like blender internal? [duplicate]

In the blender manual about the mist pass, it is explained that the height intensity of the mist pass can be controlled. This gives the effect that it is more 'cloudy' on the bottom for instance than ...
0
votes
1answer
273 views

rendering mask image but many parts failed to render

I made a simple blender model to output the RGB, Depth and Mask picture respectively. As shown in the image below, there are many cars of the same type on the ground in both RGB image and depth ...
1
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0answers
32 views

Get separate explicit render passes without rendering the entire image

Today I noticed that I need to render some paths separate from the combined path. (Z and AO). I checked the marks, put combined to off and also made the locations clear in the node editor for blender ...
4
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2answers
351 views

Difference between Shadow pass and Diffuse Direct?

What are the differences between the compositor's Shadow Pass and Diffuse Direct Passes in Cycles? I know one is that the Shadow Pass only responds to lamps and not mesh emitters. But even on renders ...
7
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1answer
638 views

How can I render Volume Scattering on all my layers?

I have an interior scene in witch I want to have atmospheric falloff (dust effect). I've created an object that contains my room and I gave it a volume scatter shader (I'm working in Cycles). The ...
8
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1answer
1k views

Correctly re-combine ALL render passes?

So, there are some great tutorials around the web about isolating render passes in Cycles so that you can make changes, and then recombine all of your work as one complete image. You'll probably have ...
1
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0answers
139 views

Best way to render passes off different objects?

I have a full detail version of a model and a less detailed version. For style reasons, I want to render my diffuse pass off the full detail model, and my gloss pass off the low detail version. I ...
0
votes
1answer
62 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 ...
1
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0answers
919 views

Is there a quick way to render only the Z depth / pass in cycles?

Hi I'm almost finished rendering an 820 frame animation and just discovered that the Z pass is missing! Argh! ... Anyone know of a quick way to render out only a Z depth pass in Cycles without ...
0
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1answer
90 views

Blender Arrow when rendering

When I try to render some scene for some reason I can see arrows around object, how can make them not to show at render?
0
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1answer
470 views

Render certain passes only WITHOUT the combined [duplicate]

I wish to de-noise my render using the compositor but I found half-way that I have no environment or emission layer selected. As rendering takes time, I wish to render only that two in order to be ...
2
votes
1answer
208 views

How to properly combine Z passes using multiple .EXR files?

I'm having trouble combining openEXRs (rendered with subframes on multiple nodes) containing Z passes in the compositor. Whenever I run 1 subframe into the normalize node I get the correct output. ...
1
vote
1answer
169 views

How to resolve the Z pass when rendering with subframes?

Currently I'm trying to render my scenes by making use of subframes to save on rendertimes through rendering on multiple nodes. But when I do this I'm having problems combining the chuncks from the Z ...
1
vote
1answer
167 views

How to combine compositor render passes from 2 types to get only one?

I want to combine or merge diffuse passes with glossy passes to get a set of new color, direct and indirect passes.
6
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1answer
504 views

How do render passes work?

I got a lot of related questions about render passes in Cycles lingering for a while now and apparently I can't figure it out myself. When it comes to render passes, this manual page with the image ...
0
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1answer
227 views

Scripting setup to save all Cycle render passes to a single EXR image

The answer here Save all render passes to a single EXR image to setup a node diagram to save all cycle render passes to a single EXR file is very useful. I am wondering if there is a programmable way ...
1
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0answers
35 views

Render layer- or render pass-like options when you can't use Film | Transparency?

I have a scene containing An object An animated screen with an image texture/transparency material, which passes in front of the camera, adding a mist-like effect to the scene A background/ground, ...
1
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0answers
422 views

How to render an environment only pass?

I'm having trouble rendering an environment only pass. The problem I'm having is that objects in the scene will cause the environment pass to include blacked out regions where they're positioned. Is ...
1
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0answers
287 views

Override all materials' color but not transparency

The situation is as follows: I would like to create an image where the pixel values (RGB) correspond to the position (XYZ) of the point in space (world coordinate). Create a new material, like in ...
6
votes
1answer
983 views

Cycle Normal Pass in Camera Space

I am wondering if there is any way that we can alter the cycle normal pass to output value in camera space. Currently, as far as I know, the normal is in object/world space, which does not change when ...
1
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0answers
50 views

Strange color noise in diffuse direct at material edges [duplicate]

I am getting strange color noise in my diffuse direct passes. It shows up at the edges of the model, and at material boundaries on the model. It happens even with basic shaders (just diffuse mixed ...
2
votes
2answers
218 views

How does the cycles render-passes (for example: diffuse) works out when using colored light source?

As i read in the blender-wiki, there are several render-passes which are added/multiplied later on in order to give the final image. My question is, How does colored light influences the values of ...
2
votes
1answer
279 views

Get Object/Material Index of Completely Transparent Objects

OK, I know the question is kinda usual. My problem is I want some objects in a scene completely transparent/invisible (in most of the render passes) while I still can show it in either material or ...
0
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0answers
185 views

Applying fog glow to textures

The image above is one of my previous renders and the one below is my recent render. As you can see, I applied a texture to each of the objects in the model, however the in the previous render the fog ...
4
votes
1answer
126 views

To what degree does Cycles' sample level impact other passes?

Can equally useful AO, Z, mist, speed and other non-beauty passes be generated at lower sample rates compared to those rates needed for beauty passes? How about ObjectID mask passes?
1
vote
1answer
246 views

Track a pixel between frames using speed (vector) outputs?

With a sequence of frames, I am looking to compute how each pixel moves between two frames (i.e., optical flows). For example, I wish to generate a "pixel movement map" that tells me, for example, ...
0
votes
1answer
168 views

I can't get Object Index to give me a clean Luma Matte. Please Help! [duplicate]

Why is it that I can't get a clean looking Luma Matte from either Object Index or Material Index Pass. As you can see in the example I provided, I do have anti-aliasing checked in the ID Mask. What is ...
1
vote
1answer
2k views

Why does the ambient occlusion pass result in a black environment?

Why does the AO render pass result in a black environment? Shouldn't this be white as default? Also, Is it possible to get a transparent environment within the AO render pass? White should do just ...
3
votes
1answer
260 views

Cycles: Export each light into separate files

Sorry in advance if this has been answered. Is there a way to set each of my 3 lights (key, fill, rim) up in such a way that Blender will render them all individually? I have looked into File output ...
2
votes
1answer
2k views

Fastest way to export files multiple passes into folders?

What is the fastest way to export the files of multiple passes into a folder for the appropriate pass in Cycles? Is there any way to automate this process? For example, if you wanted to render: ...
1
vote
0answers
54 views

Ground Transparent but keeping Shadows [duplicate]

Say I have a cube on a plane: How do I make the ground transparent but also keeping the shadow that the cube passes? I want a solid shadow, not a transparent shadow as other answers detail. Like this:...
3
votes
1answer
335 views

Make Mist pass skip semitransparent objects

I am having problems with the Mist pass. I have search other questions but didn't find the answer. As you can see, I got an ocean (left) and a "river" (right). Don`t mind about the river disappearing ...
4
votes
1answer
603 views

Blender 2.77 Motion Vectors

I am new to Blender and trying to render out motion vectors on animated objects. I animated a cube and did what I thought was correct and it rendered nothing. See video: http://www.knottypixel.com/...
0
votes
1answer
341 views

Why is my material index not working on the other eye?

I have a robot with a monocle on one eye, and now I want to give his eyes a glare effect. So what I did is, I gave the emission material that is assigned to the eyes a pass index of 1. But after the ...
1
vote
1answer
705 views

Export multi-pass .exr image sequence from cycles?

Is it possible to export an image sequence (in this case a sequence of .exrs) from cycles? For example, I have multiple sets of .exrs for different passes I want to combine into one set of .exr image ...