A lightcast is a
functional analysis
Functional analysis is a branch of mathematical analysis, the core of which is formed by the study of vector spaces endowed with some kind of limit-related structure (e.g. inner product, norm, topology, etc.) and the linear functions defined ...
and mapping of the
illumination produced by a
light source
Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terah ...
. It is used to map the physical characteristics of light emission for use in functional systems. A lightcast includes the entire zone of illumination while a
ray cast measures lighting of a single point in space near the light source.
A lightcast is typically measured using all components of a combined lighting system, including the illumination source and any reflectors, lenses, filters, and
diffusers, and the measurement may include average brightness across a flat two-dimensional surface as well as brightness across a curved of spherical surface.
Color spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called ''visible light'' or simply light. A typical human eye will respond to wavele ...
may be included, as well as moving and changing effects over time such flickering from a
candle
A candle is an ignitable wick embedded in wax, or another flammable solid substance such as tallow, that provides light, and in some cases, a fragrance. A candle can also provide heat or a method of keeping time.
A person who makes candl ...
.
Lighting
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