VEX Z-Map Fog shader

A fast volumetric light shader.

A fast volumetric light shader. Uses a Zmap image from a light to calculate shadows. Generally most useful when used in a fog object that is the child of the light it is associated with.

Parameters

Fog Color	The color of the fog. If a projection map is used, this is multiplied by the map.
Fog Density	How thick the fog appears
Attenuation	Falloff distance of the fog, from the source
ZMap Image	Image used to calculate shadows. Must be a Zpic, and is usually generated from the parent light.
Projection Map	An image to project 'through' the fog. Any colors in the image will streak through the fog.
Sampling Quality	Higher is slower but better.
Sampling Spread	Spacing of the sampling. Non-zero will essentially blur the Z or Proj maps.
Focal	Focal length of the projection. Should be the same as the focal length of the parent light.
Aperture	Equivalent to Focal. Should follow parent light.
Near Clipping	Near Clipping plane of projection.
Far Clipping	Far Clipping plane of projection.
Max Sample Steps	Maximum number of sample steps per ray. Essentially an upper limit to the Sampling Quality.
Jitter	Jitters the samples to avoid 'banding' artifacts.
Noise Type	Type of noise to be applied to the fog.
Noise Amount	Essentially mixes in the noise. 0 is no noise.
Noise Roughness	Controls noise’s rough or smooth appearance.
Noise Attenuation	Controls falloff of the noise. Higher is less noise
Noise Frequency	Controls the size of the noise. Higher is smaller
Noise Offset	Offsets the noise to simulate movement of the noise
Noise Space	Normally World space. If set to Fog space, the noise will streak through the fog from the source and will move with 'with' the fog if animated.
Fog in Shadow	Instead of 'normal' volumetrics will only put fog into shadow areas. Very cool!

Usages in other examples

Example name	Example for