Questions tagged [render-layers]

Render layers are used to separate pieces of a scene for rendering. Those layers can then be treated differently in the compositor.

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24
votes
9answers
35k views

Why does my object not show up?

This is meant to solve this problem once and for all. What is every reason an object isn't showing up in a render or viewport in when using the cycles render engine?
18
votes
1answer
8k views

Can someone explain the layer system?

I am really confused with the different uses of the terms "Layers" and "Passes" in Blender. Can someone please explain how they work in Blender. I know about Render Passes like AO, Diffuse and so on, ...
15
votes
2answers
12k views

How can I render all render passes to files in Cycles?

How can I render all render passes for all of the frames of an animation in Cycles to different files or a file with multiple layers? I'm going to do the final compositing in another compositing ...
12
votes
4answers
2k views

Where do the white lines come from in my composite?

I'm having this issue for years now, and I'm not sure if I am doing something wrong on my end, or if what I would like to achieve - or expect to see - is even possible. My question is about ...
12
votes
3answers
4k views

Is it possible to use more than 20 layers?

Is it possible to use more than 20 Scene layers or Render layers in Blender?
12
votes
1answer
422 views

Different seeds on different render layers

Under the Render Properties tab there is a setting to change the seed used for ray tracing. Is there a way to use different seeds on different render layers? I know this is possible using multiple ...
11
votes
2answers
10k views

One render layer with background image and one with transparent background

I made an animation with an environment texture in the background and I would like to have one render layer with only the background image and another render layer with all the objects on a ...
11
votes
2answers
3k views

Is there a way to have Cycles skip rendering alpha?

If I wanted to create an animation, each frame would have several seconds of rendering a completely transparent part, which adds up obviously. Is there a way to eliminate this waste of time?
11
votes
3answers
4k views

How to get reflections from 3D to show up on real images

Andrew Price released a nice tutorial on how to nicely put 3D objects on top of a real image: https://www.youtube.com/watch?v=wjWoglMYXBE I have seen images, such as this: https://s3.amazonaws.com/...
10
votes
1answer
2k views

Repurposing vector (speed) render layer for optical flow

I'm trying to compute optic flow in my Blender scene using the "speed" render layer (appears as "vector" in the outliner window). This render layer is supposed to return the speed and direction of ...
8
votes
1answer
5k views

How to render world position pass

A world position pass is a pass used for composting other elements into the scene after the initial render. In a world position pass the R, G, B values correspond to the X, Y, Z axis (or X, Z, Y). A ...
8
votes
1answer
1k views

How can I blend a moon/planet (textured sphere) into the background (procedural sky texture)?

I've been trying to tackle this challenge for a week or two now and I'm still somewhat stumped. I am trying to create the effect of a moon or large planet seen in orbit from the surface during ...
8
votes
1answer
4k views

Remove reflection of one object from another object?

I have a reflective object and I want it to reflect only light and not the surrounding objects. I have moved it to Layer 2, but it still reflects the objects from ...
7
votes
1answer
3k views

Cycles rendering objects all black

I added a texture to the bowl, and it came out rendered black. I unwrapped it, and I did a little node editing, to make the plane glossy and B&W. It looks fine in the preview, as well as in ...
7
votes
1answer
318 views

Is it possible to give each render layer specific render settings?

For example, I have a RenderLayer with my scene that I can render with my GPU, but I have a scene that's point density intensive (still crashes my GPU with 2.77) and needs to be rendered with CPU. Is ...
7
votes
3answers
4k views

How can I move an object on a separate layer behind another in the compositor?

How can I make the light bar, after compositing (applying the blur effect on it), be displayed behind the ball, not in front of it?
7
votes
2answers
741 views

How do I use the compositor to render with different color management profiles?

I'm using several scenes to render several images at the same time with the File Output nodes in the compositor. I have different Color Management settings in my scenes. Yet when I render my images ...
7
votes
1answer
810 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 ...
7
votes
1answer
360 views

How to make original full-pass image from separate passes?

I'm trying to create an image from separate passes. That is, I have a result image, which without altering the composite Combined RGBA buffer looks like following: On this image you can see a cube ...
6
votes
2answers
8k views

Create invisibility cloak (alpha mask material)

How can I create an invisibility cloak? It should be an invisible object which causes other specified objects to become invisible when it covers those objects.
6
votes
2answers
1k views

Cycles alpha mask hole

I use Cycles. The main goal is to render different objects from various scenes into separate files using alpha mask. It’s necessary to ensure that in future pictures do not overlap, when images ...
6
votes
2answers
2k views

How to make an object transparent to the freestyle pass?

In Blender 2.75a, I'm making a render using Cycles and the Freestyle pass. My scene contains a mesh with a smoke modifier that I'm rendering through a volumetric shader. The boundaries of this mesh (...
6
votes
1answer
883 views

How do I rearrange the list of render layers?

This may seem like a strange question but I set up a space scene with stars and planets and etc and each had their own layer except the planets which I accidentally put on the same one as the stars. I ...
6
votes
2answers
2k views

How do I render specific render layers using python?

Does anybody know how to choose one or more from multiple defined render layers by name from command line or from the blender python console? To disable all render layers except the ones specified.
6
votes
1answer
2k views

Cannot blur one render layer and then Z-combine it with another layer

this is driving me crazy. I want the trails in this scene to glow: But when plugging the trails into the z combine node the blur is removed. If you have an idea why that is and what I can do to fix ...
6
votes
1answer
55 views

Is it possible to enable render transparency for only certain renderlayers?

I am currently rendering a scene that because of polycount issues I have to render on three different renderlayers. However I would like to disable the render transparency for one of those ...
5
votes
2answers
3k views

Fade a render layer to transparent

Instead of editing the alpha for each material, it would be quicker for me in this case to be able to fade out the entire render layer in the node compositor. The "SetAlpha" node seems perfect for ...
5
votes
1answer
879 views

How to have Denoiser ignore certain objects?

I have a scene with some objects that have image textures. Denoising the entire scene makes the image textures on certain objects to look less sharp. How do I get Blender to denoise an entire scene ...
5
votes
1answer
7k views

Compositor result won't show

I have problem with compositor. It doesn't show result in output render until I replug Image into Composite node. I am rendering 2 layers, but it show only first layer, without anything modified, ...
5
votes
2answers
368 views

blender kill particles not viewing in render

I am making a harry potter video with friends and I'm adding magic between the 2 wands. I'm using 2 particle systems with gravity off pulled by a force field for the magic and killing them when they ...
5
votes
1answer
8k views

How to create a shadows pass in cycles?

Everytime I am doing one thing another problem comes up, and I have a deadline to follow unless there is a way to create shadows using another software (after effects)? I want to composite this thing ...
5
votes
1answer
358 views

Best way to change a value between render layers?

I have a setup where I am re-rendering the same geometry on several different layers. I want to change a property in the geometry's material before each layer runs (probably via a driver). The goal is ...
5
votes
1answer
303 views

Is it possible to link a modifier for only one Render Layer?

I have a scene in which I want to render some of the same objects in two separate Render Layers, with different modifiers in each Render Layer. I know how to link modifiers using Ctrl+L > Modifiers, ...
5
votes
1answer
1k views

How to do a lightcast only Layer in Cycles?

I try to render a layer that only includes the light as if it was cast onto an object. But it seams it is not possible to make a material that is invisible for the camera but bounces light from a ...
4
votes
2answers
3k views

Layers section is not in the render settings panel?

I'm very new to Blender and I have been watching some tutorials on how to make models within it. In every one of these, their render settings (In the properties tab) have a Layers section below the ...
4
votes
1answer
289 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 ...
4
votes
2answers
633 views

Z-Buffer render gives unexpected results

I'm rendering blender's z-buffer to an image using render layers under compositing in cycles, but I'm noticing unexpected results. Here is an example of a typical z-buffer render (not from blender). ...
4
votes
1answer
715 views

How to render a hdri on a separate layer

What's the best way to combine 2 render layers with a HDRI background? I wanna have 3 layers and having one layer be denoised and have a separate layer just for the HDRI.
4
votes
1answer
369 views

Preview render selected renderlayer?

is it possible to preview the selected renderlayer in the viewport? I have a couple of renderlayers with override materials that I would like to check in the viewport, but it seems previewrender ...
4
votes
1answer
13k views

How can I combine two render layers?

I would like to know which nodes can I combine this two render layers width? I've made this with alpha over node and transparent rendering. I want such an image but I don't want to lose the ...
4
votes
1answer
4k views

Scene complexity and VRAM

I'm going to build my new workstation/rendermachine and im stuck with the question: "how much vram do i actually need?" More gpu accelerate the rendering process, but the max vram load is given by ...
4
votes
1answer
300 views

Driver based on Render Layer

I want to drive a property in a Cycles material based on the current Render Layer or Scene being rendered. Is there any such property? If not, is this something that could be made as an addon, or is ...
4
votes
1answer
961 views

Rendering an object through another

Is there a way to render one object through another, but only that particular object? It would look similar to how xray mode functions in the viewport. I'm trying to achieve the effect of rendering ...
4
votes
1answer
1k views

How to stop rendering a renderlayer at any moment of the animation?

I have 3 render layers that I'm compositing together in the 4th one. Everything works fine, but even if I don't see the layer in some specific moment blender still renders it. The problem is that I ...
4
votes
1answer
580 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 ...
4
votes
3answers
257 views

Is “value” Blend mode same as “luminosity” Blending mode from Photoshop?

I tried for so long to look info for this problem and found basically nothing. I am trying to adopt a technique from Photoshop to Blender to match the colors of 2 different scenes, but end up in the ...
4
votes
1answer
538 views

How can I Z-combine multiple render layers

I have a problem while compositing my render layers. There is a butterfly that goes through a jungle (images as plane). It appears on the foreground, and goes to the background followed by a camera. ...
4
votes
2answers
298 views

Transition from one background to another as object moves in front of camera

I have a mesh object passing in front of a camera; the camera is locked in a fixed upward view. The background to the scene is a sky full of moving procedural clouds. I believe the node setup is ...
4
votes
1answer
486 views

How can I update a specific layer of a multilayer exr file?

Is it possible to "update" parts of a multilayer exr while retaining other render layers? Let's say I have two layers A and B. I render both layers to the same exr and later I decide to re-render ...
4
votes
1answer
2k views

Renders doesn't display in Node Editor while compositing

I follow that tutorial step by step: https://www.youtube.com/watch?v=H3sSZ6W7rgQ and had to stop around 44:00 - I had rendered my image and when I go into Node Editor there is no way to make backdrop ...

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