--- ray/doc/ray.1 2023/11/15 18:28:09 1.41 +++ ray/doc/ray.1 2023/11/16 21:57:39 1.42 @@ -1,4 +1,4 @@ -.\" RCSid "$Id: ray.1,v 1.41 2023/11/15 18:28:09 greg Exp $" +.\" RCSid "$Id: ray.1,v 1.42 2023/11/16 21:57:39 greg Exp $" .\" Print using the -ms macro package .DA 11/13/2023 .LP @@ -1212,9 +1212,9 @@ spectral range in nanometers. Subsequent real values correspond to multipliers in each wavelength band, where the first band goes from nmA to nmA+(nmB-nmA)/N, and N is the number of bands (i.e., the number of real arguments minus 2). -The nmA wavelength may be greater or less than the nmB wavelength, -but they may not be equal, and their ordering must correspond to -the ordering of the spectral values. +The nmA wavelength may be greater or less than nmB, +but they may not be equal, and their ordering matches +the order of the spectral values. A minimum of 3 values must be given, which would act more or less the same as a constant RGB multiplier. As with RGB values, spectral quantities normally range between 0