Overview
This node refracts a base image through a perfectly transparent three-dimensional refractive medium. The surface of this medium is defined by a height map provided by one of the node's inputs.
You can think of this node as what you would see if you looked at a picture though an irregular piece of glass.
Inputs
Input |
Description |
Base |
The base image to be refracted through an irregular three-dimensional medium. |
Heightmap |
The red channel of this input is used as a height map for constructing the refractive volume. |
Properties
Property |
Description |
Index |
Specifies the refractive index of the surface. The refractive index describes the degree to which a surface will bend light rays passing through it. |
Elevation |
Increasing values move the refractive surface farther away from the base image in the z direction, increasing the effects of distortions. Negative values move the volume closer to the image, and eventually behind it, at which point refraction will no longer occur. |
Height Factor |
Scales all values of the input height map by a given factor to quickly change overall elevations. Entering a negative value will reverse elevations, although a positive Elevation must be set at that point for there to be an effect. |