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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.