Page History

The Sampler Info Render Element is a color image that provides information about the scene, with the choice to show any of various aspects as color blocks. This render element provides information about various aspects of the shaded points such as position, normal, bump normal, reflection/refraction vectors and UVW coordinates, which previously were only available through the Extra Texture Render Element. This render element can be used either for world position passes or normal passes. It extracts particular information about the scene, converting the gathered information into RGB data for use in compositing.

Image Modified

Enabled – The render element is generated.

Deep output – Specifies whether to include this render element in deep images.

Filename suffix

 – The text added to the end of the rendered file, when saved as a separate file (e.g. myrender.samplerInfo.vrimg).

Type – Controls the type of render element produced by vrayRE_Sampler_Info:

Point – The X, Y, and

Z coordinates of the point are converted to RGB

data according to

the Coordinate system

 that is set. This outputs a Position Pass for use in compositing.
Normal

vector – The direction of the normal at the particular shaded point according to which  Coordinate

 system is set (Object, World, Camera or Relative space)
Reflection

vector – Commonly used for

adjusting reflections in the composite.
Refraction

vector – Commonly used for

adjusting refractions in the composite.
UVW

coordinates – Extracts the UVW coordinates of the object at the particular shaded point.  This can be used to apply another texture at a composite level.
Normal vector with bump

mapping –  Produces the bump normal according to the Coordinate

 system that is set.
Backward

occlusion – The red and green components of this render element represent the screen position of the shaded point at the beginning of the motion-blurred frame, while the blue component represents camera occlusion at the beginning of the motion-blurred frame. Together with

the Forward occlusion

render element, this can be used for denoising and/or post-process motion blur.
Forward

occlusion – The red and green components of this render element represent the screen position of the shaded point at the end of the motion-blurred frame, while the blue component represents camera occlusion at the end of the motion-blurred frame. Together with

the Backward occlusion

render element, this can be used for denoising and/or post-process motion blur.
Integer ID from node user

attribute – Extracts any integer node user property into an integer render element. Can be used as an extended Object ID.
Float number from node user

attribute – Extracts any floating-point node user property into a single-channel floating-point render element. Can be used to extract additional masks.

Point

multiplier – Acts as a multiplier

when Type

 is set

to Point.

Refraction

IOR – Sets the index of refraction when Refraction vector

 is set as the

 Type.

UVW

Channel – The UVW mapping channel used when

the Type

 is set

to UVW coordinates, if

no UVW Channel Name

 is specified.

UVW Channel Name – The default UVW mapping channel used when

the Type

 is set

to UVW coordinates. Specifies the UVW Channel to render by the name of the UV set. 

UVW

Mode – Specifies what happens to UVW values outside the 0.0-1.0 range of the unit texture square:

Normal – Stores the UVW coordinates without modification.

Clamp – UVW coordinates above 1.0 are clamped to 1.0, and values below 0.0 are clamped to 0.0.

Tile – Wraps the UVW coordinates to the unit texture square.

  Coordinate system – Controls the coordinate system used:

World –  X, Y, and Z coordinates (in world space) of the point are converted to RGB data.

Object – X, Y, and Z coordinates (in object space) of the point are converted to RGB data.

Camera – X, Y, and

Z coordinates (in camera space) of the point are converted to RGB data.

Relative – X, Y, and Z coordinates in the object space of

the Relative node

 are converted to RGB data.

Relative

node – When Coordinate system

 is set

to Relative, this specifies the scene node relative to which the point/vector data is stored.

Output – Controls the way data is stored in the render element when

the Type

 is a Normal vector, or

a Reflection/Refraction

 direction:

Vector (signed)

 – Values are stored directly without modification, including negative components.
Color (unsigned)

 – Values are scaled down by 0.5 and offset by 0.5 so that (0, 0, 0) maps to (0.5, 0.5, 0.5), (-1, -1, -1) maps to (0, 0, 0) and (1,1,1) maps to (1,1,1). This avoids negative values which might be necessary for some compositing packages.

User

attribute –  Determines which user attribute to connect to

when Integer ID from node user attribute

 or Float number from node user

attribute is selected as

 Type.

Occlusion

Bias – Controls the positional bias of

the Backward occlusion

 and  Forward occlusion

 types in order to prevent incorrect self-occlusion.

Filtering

 – Applies the image filter to this channel. Image filter settings are in

the Image

Sampler rollout in the

 VRay tab

 of the Render Settings.

Denoise – Enables the render element's denoising, provided the Denoiser render element is present.