Lights and Skymaps

Lights and Skymaps

ISET3D supports point, spot, area, and environment (skymap) lights, each with a spectrum specified by a named illuminant, a blackbody temperature, or RGB. For the full API — piLightCreate/piLightSet, adding, deleting, rotating, and translating lights, and setting a skymap — see the iset3d-lights-and-skymaps skill in the ISET3D repository.

Tutorials

Start here:

• t_piIntro_light.m — inspect scene lights, replace them with a spot light, then an environment light.
• t_piIntro_illumination.m (.m) — replace the default lighting and inspect illuminant spectra.

Going deeper:

• t_piLightSpectrum.m — assign built-in spectral descriptions to a spotlight.
• t_arealight.m — area light creation and parameters.
• t_arealightArray.m — arrays of area lights against a textured surface.
• t_arealightSize.m — change area light size and compensate the SPD specscale.
• t_arealightSpread.m — rotate, translate, and scale a light while looking directly at it.
• t_lightCube.m — a six-sided cube light emitting different colors per side.
• t_skymapDaylight.m — compute a daylight spectral power distribution from an RGB value.

Manual run (marked % SkipFile — excluded from the automated tutorial smoke test, but still useful):

• t_lightGoniometric.m — a goniometric light; depends on optional external assets.