llLinear2sRGB

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/LSL

LinearTosRGB

llLinear2sRGB

Summary

Function: vector llLinear2sRGB( vector color );

	Forced Delay
	Energy

Returns a vector Transforms a color specified in linear RGB colorspace into the sRGB colorspace.

• vector

color

–

Color in the linear color space.

Specification

Lights in Second Life are specified in LSL as linear red, green blue values in the range (0.0, 1.0). Internally light calculations are performed in the sRGB colorspace.

The sRGB (Standard Red Green Blue) colorspace is defined in IEC 61966-2-1:1999 and was developed as a joint project between Microsoft and HP.

This calculation is known as an Inverse Electro-Optical Transfer Function (IEOTF).

Caveats

• The name of this function is actually a misnomer as LSL color is actually in Rec.709 space, not sRGB space. While they are very similar, the gamma value for sRGB is approx. 2.2, whereas the gamma value for Rec.709 is approx. 2.4.
• If you enter color vectors manually, using the viewer's color picker, enter them as Linear RGB values. The color picker automatically converts them internally to sRGB, so someone using a PBR-enabled viewer will see them correctly. This means that if you are defining colors with a script, the same is true. You do not need to use llLinear2sRBG to convert your color vectors and apply them separately for PBR.

Examples

See Also

Functions

•

llsRGB2Linear

To convert from sRGB to the Linear colorspace. (EOTF)

Deep Notes

Signature
function vector llLinear2sRGB( vector color );