Triplanar Projection

Parameter Types

Parameter description

File X

The image file to project from the positive X direction toward the origin.

File Y

The image file to project from the positive Y direction toward the origin.

File Z

The image file to project from the positive Z direction toward the origin.

Default

The default value the node uses if any of the ​file​ references fail to resolve.

Position

The 3D coordinates at which the node reads data for mapping the texture onto a surface. The default uses the current 3D object-space coordinates.

Normal

The 3D normal vector the node uses for blending; the default is the current object-space surface normal.

Filter Type

The type of texture filtering the node uses; the default is linear.

Discussion

Use the Triplanar Projection node to blend three different images together based on the vector normal of each point on the object. Areas of the object that are parallel with a coordinate axis cause the node to fully show the respective image. Areas of the object between the coordinate axis cause the node to render a mix of the images based on how close the normal is to each of the axis. The closer the normal is to the normal of a coordinate axis the strong the respective image is in the blend. Below is an example of a simple node graph that uses the Triplanar Projection node to blend the same grass image in the X and Y directions, and a tile texture in the Z direction:

[Image]

Below, the resulting texture applies to a sphere:

[Image]