Heightmap

The heightmap shader treats the first layer of voxels as a 2D height-map texture and extrudes upwards to create a 3D volume. Height is determined by the perceived luminance of each voxel.

Height-map texture	Results

• Parameters
• Blur
• Auto Balance
• Reverse

Parameters

Parameter	Description
Blur	Blurs the height-map by the number of voxels to smooth any noise in the original texture. The default value of 0 does not blurring, and values up to 10 increase the blurring and the smoothness of the result.
Auto Balance	When 1, the range is remapped according to the selected colours in the palette. When 0, the range is not changed by the palette. See below for more information.
Reverse	When 0, the luminance of a voxel determines how far it is extruded. When 1, this is reversed and darker voxels are extruded.

Blur

Blur: 0	Blur: 3
Blur: 6	Blur: 10

Auto Balance

	Auto Balance: 0	Auto Balance: 1
Height-map texture

The heightmap shader uses the perceived luminance of a voxel to determine its height. By default, the maximum luminance is white (1.0) and minimum is black (0.0).

The maximum height is determined by the volume size.

If your volume is 20x20x40 voxels, A luminance of 1 would equal 40 voxels; 0.5 would equal 20 voxels; etc.

For instance, if you import a height-map texture that ranges from black (0.0) to 50% grey (0.5), the heightmap shaders can do two things:

• If Auto Balance is 1 and you select the colors in the palette used by the height-map texture, the shader will treat the colours relatively and calculate a new maximum and minimum ranges for you.
• If Auto Balance is 0, the shader will treat values absolutely with no changes, meaning the highest point will be 50% of the volume.

If Auto Balance is 1 and you haven't selected ever colour used by the height-map texture, those unselected colours are ignored when generating the map. This can lead to odd results.

Reverse

Reverse: 0	Reverse: 1