Fast Volume Effects

 
 
 

| Fast_Volume_Effects | Volumic | Smoke

Category: Volume

Shader Family: Volume

Output: Color

When used with the Fast Light Effects shader, gives a volumetric effect to lights. Both the Fast_volume_effects and the Fast_light_effects shaders must be used for each light that is to receive volumetric effects. If no Fast_light_effects shader is used, the light will have no volumetric effects.

Fast_Volume_Effects

si_default

start

Specifies where the volumetric effect begins (completely transparent).

stop

Specifies where the volumetric effect ends (completely opaque).

rate

Specifies the transparency of the volumetric effect. 0 = completely transparent and will not obscure light; 1 = opaque.

transmit

Specifies the color of the volumetric effect that light rays are faded into.

light rays

Specifies whether or not light rays are also attenuated by the volumetric effect.

When on, light illumination is subject to volumic attenuation;

when off, lights can illuminate objects at any distance regardless of the volumetric effect.

Volumic

Lights

Lights

Creates a light list to specifiy which lights should produce the effect. For more information, see Using Light Lists [Direct Illumination].

Sampling

Feature Size

Controls the steps of a volume map. Use this to "smooth" the volumic effect.

Max Ray Length

Sets an upper limit on the distance that light rays travel in a volumic environment.

Smoke

Smoke

When on, it overlays a "smoky" effect over the volumetric effects.

Depth Fading

When on, it Switches on the calculation of depth fading in addition to the volumetric effects.

3D Smoke

Specifies the Z-depth of the smoke.

Scale

Specifies the size of the smoke.

Intensity

Specifies the thickness, or density, of the smoke.

Animation Speed

Specifies the distance smoke will travel over time.