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Type – Specifies the type of projection mapping to use from the following:

None – No UV coordinates for projection are generated. The expected result is for pixel color at the (0, 0) coordinates of the input texture to be sampled and applied uniformly across the entire shaded surface.
Planar – The input texture is projected from an imaginary planar surface, facing towards the negative Z axis.
Spherical – The input texture is projected from an imaginary spherical surface. Additional control over the projection is provided through the U Angle and V Angle parameters.
Cylindrical – The input texture is projected from an imaginary cylindrical surface. Additional control over the projection is provided through the U Angle parameter.
Cubic – The input texture is projected inwards towards the surface, from all six sides of an imaginary box.
Triplanar – The equivalent of three Planar projections, one for each axis. The benefit of this mapping type compared to the Cubic projection is that it produces uniformly-sized UV scaling, whereas the Cubic type produces distortions for very tall/slim/narrow objects (unless manually resolved by scaling the Cubic projection using a V-Ray Transform Matrix VOP).
Perspective – The input texture is projected towards the surface from the camera provided under the Projection Camera parameter.

Object Space – When enabled, the projection is applied in the object space of the currently shaded geometry. This means that object-level transformations applied over the node will affect the scale and/or orientation of the projection.

U/V Angle – Only used for the Spherical and Cylindrical projection mapping types. Provides control over the number of texture repetitions. 

Motion Blur Samples – Determines the number of geometry segments used to approximate motion blur. Objects are assumed to move linearly between geometry samples. For objects rotating at high speed, increase this parameter to get correct motion blur. Note that higher values increase memory consumption since more geometry copies are kept in memory. 

Mapping

Wrap U – Specifies if wrapping in the U direction is disabled (No Wrapping), if it Wraps around (Wrap), or if it tiles and mirrors itself (Mirror Tile).

Crop U – Enables or disables cropping in the U direction.

Wrap V – Specifies if wrapping in the V direction is disabled (No Wrapping), if it Wraps around (Wrap), or if it tiles and mirrors itself (Mirror Tile).

Crop V – Enables or disables cropping in the V direction.

Wrap W – Specifies if wrapping in the W direction is disabled (No Wrapping), or it Wraps around (Wrap), or if it tiles and mirrors itself (Mirror Tile).

Crop W – Enables or disables cropping in the W direction.

Use Additional Scale – When enabled, applies an additional scale factor for the texture derivative.

UVW Transform – 

Mapping Type – Determines how the texture is mapped:

angular
cubic
spherical – This Mapping Type imitates as if an infinite sphere surrounds your scene and is mapped with spherical mapping coordinates.
mirror_ball
screen
max_spherical
spherical_vray
max_cylindrical
max_shrink_wrap
max_world_xyz

Wrap U/ Wrap V/Wrap W – Wraps the map on its U, V, or W direction according to one of the following ways:

None
Tile
Mirror

Crop U/V/W – Crops the map in its U/V/W direction.

DUVW Scale  – Specifies an additional scale factor for the texture derivatives.

Ground – Enables or disables the ground plane option.

Ground Radius – When Ground is enabled, this specifies the radius of the ground.

Uvw Matrix

Uvw Transform

Ground Position

Crop U/V/W – Crops the map on its U/V/W direction.

Duvw Scale – 

Ground on – 

Ground Radius – 

Mapping Type:

Wrap U/ Wrap V/ Wrap W – Wraps the map on its U/V/W direction according to one of the following ways