10.1.12  Atmospheric Effects

Describe various background and atmospheric features

ATMOSPHERIC_EFFECT:

MEDIA | BACKGROUND | FOG | SKY_SPHERE | RAINBOW

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10.1.12.1  Background

Specify a background color for the scene:

BACKGROUND:

background { COLOR }

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10.1.12.2  Fog

Simulate a hazy or foggy atmosphere:

FOG:

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CONSTANT_FOG | GROUND_FOG

CONSTANT_FOG:

fog { [FOG_IDENTIFIER] [fog_type 1] FOG_ITEMS }

FOG_ITEMS:

distance FLOAT & COLOR & [TURBULENCE [turb_depth FLOAT]]

GROUND_FOG:

fog { [FOG_IDENTIFIER] fog_type 2 GROUND_FOG_ITEMS }

GROUND_FOG_ITEMS:

FOG_ITEMS & fog_offset FLOAT & fog_alt FLOAT & [up VECTOR [TRANSFORMATION...]]

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10.1.12.3  Sky Sphere

Specify a sky pigment:

SKY_SPHERE:

sky_sphere { [SKY_SPHERE_IDENTIFIER] [SKY_SPHERE_ITEM...] }

SKY_SPHERE_ITEM:

PIGMENT | TRANSFORMATION

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10.1.12.4  Rainbow

Specify a rainbow arc:

RAINBOW:

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rainbow { [RAINBOW_IDENTIFIER] [RAINBOW_ITEMS] }

RAINBOW_ITEMS:

direction VECTOR & angle FLOAT & width FLOAT & distance FLOAT & COLOR_MAP & [jitter FLOAT] & [up VECTOR] & [arc_angle FLOAT] & [falloff_angle FLOAT]

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