PxrBlackBody
PxrBlackBody
Produces a color that represents the radiation emitted by an ideal black body heated at the given temperature in the visible spectrum. This allows you to easily create plausible light colors based on standard temperature measurement.
Input Parameters
Temperature
The temperature (in kelvin) of the black body. Color temperatures over 5,000K are called cool colors (bluish white), while lower color temperatures (2,700 to 3,000 K) are called warm colors (yellowish white through red).
Top: linear ramp from 1,000K to 6,500K at -22 exposure. Bottom: linear ramp from 5,000K to 15,000K at -28 exposure.
Temperature Value Source 1700 Match flame 1850 Candle flame, sunset/sunrise 2700 to 3300 Incandescent lamps 3000 Soft (or warm) white compact fluorescent lamps 3200 Studio lamps, photofloods, etc. 3350 Studio "CP" light 4100 to 4150 Moonlight 5000 Horizon daylight 5500 to 6000 Vertical daylight, electronic flash 6200 Xenon short-arc lamp 6500 Daylight, overcast 6500 to 10500 LCD or CRT screen 15000 to 27000 Clear blue poleward sky
RIB: float temperatureDefault: 5500.0
Physical Intensity
When set to 1, the color will emit the correct amount of energy. WARNING: Your color will become super intense.
RIB: float physicalIntensityDefault: 0.0
Exposure
Use exposure to adjust the amount of emited energy. Very useful if physical intensity is above zero.
RIB: float exposureDefault: 0.0
Output Parameters
resultRGB
The color emitted from the black body that was heated to the given temperature.
resultR
The R channel from the resultRGB output.
resultG
The G channel from the resultRGB output.
resultB
The B channel from the resultRGB output.