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Panel: Properties > View Layer Properties > Passes

2.9 <2.8>

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.

Passes

Data

Combined

All these lighting passes can be combined to produce the final image as follows:

Blender 2.82 Manual より

Z

Distance to any visible surfaces.

ｉNote

The Z pass only uses one sample. When depth values need to be blended in case of motion blur or Depth of Field, use the mist pass.
Depth Of Field

Mist

Distance to visible surfaces, mapped to the 0.0-1.0 range. When enabled, settings are in World tab. This pass can be used in compositing to fade out objects that are farther away.
World tab

Normal

Surface normal used for shading.

Vector

Motion vectors for the Vector Blur node. The four components consist of 2D vectors giving the motion towards the next and previous frame position in pixel space.

UV

Mapped UV coordinates, used to represent where on a mesh a texture gets mapped too. This is represented through the red and green channels of the image, the blue channel is encoded with a constant value of 1 but does not hold any information.

Object Index

Creates a mask of the object that can be later read by the ID Mask Node in the Compositor.
ID Mask Node ?

Material Index

Creates a mask of the material that can be later read by the ID Mask Node in the Compositor.
ID Mask Node ?

ｉNote

The Z, Object Index and Material Index passes are not anti-aliased.

Denoising Data (デノイズデータ)

アニメーション全体をレンダリングし後の 2 回目のパスでアニメーションのノイズ除去を行うために、ノイズ除去機能が必要とするパス。レンダリング処理の一部として静止画のノイズ除去を行う場合、これらは必要ありません。
このオプションをオンにすることで、以下のパスが Render Layers Node に追加表示されます。

• ● Noisy Image
• ● Denoising Normal
• ● Denoising Albedo
• ● Denoising Depth
• ● Denoising Shadowing
• ● Denoising Variance
• ● Denoising Intensity
• ● Denoising Clean

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Noisy Image	Denoising Normal	Denoising Albedo	Denoising Depth	Denoising Shadowing	Denoising Variance	Denoising Intensity	Denoising Clean

Render Time

Render time in milliseconds per sample and pixel.

Alpha Threshold

Z, Index, normal, UV and vector passes are only affected by surfaces with alpha transparency equal to or higher than this threshold. With value 0.0 the first surface hit will always write to these passes, regardless of transparency. With higher values surfaces that are mostly transparent can be skipped until an opaque surface is encountered.

Light

Diffuse / Glossy / Transmission / Subsurface / Volume

Direct

Direct lighting from diffuse BSDFs. We define direct lighting as coming from lights, emitting surfaces, the background, or ambient occlusion after a single reflection or transmission off a surface. BSDF color is not included in this pass.

Indirect

Indirect lighting from diffuse BSDFs. We define indirect lighting as coming from lights, emitting surfaces or the background after more than one reflection or transmission off a surface. BSDF color is not included in this pass.

Color

Color weights of diffuse BSDFs. These weights are the color input socket for BSDF nodes, modified by any Mix and Add Shader nodes.
glossy BSDFs.
transmission BSDFs.
subsurface BSDFs.

Emission

Emission from directly visible surfaces.

Environment

Emission from the directly visible background. When the film is set to transparent, this can be used to get the environment color and composite it back in.

Shadow

Shadows from light objects. Mostly useful for compositing objects with shadow into existing footage.

Ambient Occlusion

Ambient occlusion from directly visible surfaces. BSDF color or AO factor is not included; i.e. it gives a 'normalized' value between 0 and 1.

ｉNote

Transparent BSDFs are given special treatment. A fully transparent surface is treated as if there is no surface there at all; a partially transparent surface is treated as if only part of the light rays can pass through. This means it is not included in the Transmission passes; for that a glass BSDF with index of refraction 1.0 can be used.
Transparent BSDFs are given special treatment.

Cryptomatte

Cryptomatte is a standard to efficiently create mattes for compositing. Cycles outputs the required render passes, which can then be used in the Blender Compositor or another compositor with Cryptomatte support to create masks for specified objects.

Unlike the Material and Object Index passes, the objects to isolate are selected in compositing, and mattes will be anti-aliased and take into account effects like motion blur and transparency.

Object

Render cryptomatte object pass, for isolating objects in compositing.

Material

Render cryptomatte material pass, for isolating materials in compositing.

Asset

Render cryptomatte asset pass, for isolating groups of objects with the same parent in compositing.

Levels

Sets how many unique objects can be distinguished per pixel.

Accurate Mode

Generate a more accurate Cryptomatte pass. CPU only, may render slower and use more memory.

Typical Workflow

Cryptomatte 参照。

 > See also

Cryptomatte Node

Shader AOV

Shader AOVs (Arbitrary Output Variables) provide custom render passes for arbitrary shader node components. As an artist this can be a good way to debug or tweak very fine details of a scene in post processing. To use Shader AOVs create the pass in the Shader AOV panel then reference this pass with the AOV Output shading node. Shader AOVs can be added or removed in the Shader AOV panel. In this panel is a list of all AOV passes; each AOV in the list consists of a Name and Data Type.
AOV Output Node

Name

The name of the render pass; this is the Name that is referenced in the AOV Output node. Arbitrary names can be used for these passes, as long as they do not conflict with built-in passes that are enabled.

Data Type

Shader AOVs can either express a Color or a Value variable. The Color variable as the name suggest can be used for a color but also a normal value. A Value variable can be used for any single numerical value.