environment Element Reference

An environment map roughly models distant illumination surrounding a scene by conceptually surrounding the scene with a spherical emitter that emits light inwards according to a distribution defined by a 2D 'environment' texture map that is projected onto the surface of the sphere. Note the term HDR environment map is thrown around a lot; the only difference is that the underlying environment texture is stored in some type of high dynamic range format, such as OpenEXR or HDR. More...

Inheritance diagram for environment:

List of all members.

Attributes
clampedSpectrum	power
	Wavelength-dependent distribution of emitted power.
string	path
	Path to environment map image.
string	coords
	Type of coordinates this environment map is stored in; specifies the type of 3D -> 2D projection (and vice-versa) to be used for sampling the environment map image.

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Detailed Description

An environment map roughly models distant illumination surrounding a scene by conceptually surrounding the scene with a spherical emitter that emits light inwards according to a distribution defined by a 2D 'environment' texture map that is projected onto the surface of the sphere. Note the term HDR environment map is thrown around a lot; the only difference is that the underlying environment texture is stored in some type of high dynamic range format, such as OpenEXR or HDR.

Note:

environment corresponds to the underlying Milton class 'EnvironmentMap.'

Example usage:

"scene" : {

// specify a background HDR environment map

"background" : {

"emitter" : {

"type" : "environment",

"coords" : "spherical",

"path" : "data/env/grace_probe.hdr",

},

},

// ...

},

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Attribute Documentation

clampedSpectrum environment::power

Wavelength-dependent distribution of emitted power.

type	clampedSpectrum
optional	true
default	0
units	Watts

string environment::path

Path to environment map image.

type	string
optional	false

string environment::coords

Type of coordinates this environment map is stored in; specifies the type of 3D -> 2D projection (and vice-versa) to be used for sampling the environment map image.

Note:

Projections supported are "sphereical" or "latLong".

type	string
optional	true
default	spherical