[Radiance-general] sky models and color gradients

[Lars O. Grobe]

Hi!
> I am interested in this, too. How best to make it work? Convert the
> formulae in the paper to a .cal file (that modifies a mist volume or a
> dome-like source?) Pre-render a sky dome? Modify the Radiance source
> itself?
I think that there are two ways. One is to generate a mapping on a
source object, the other is "modeling the athmosphere". The second
option is quite ambitious, and may depend e..g. on photon map, spectral
rendering and other stuff (i.e. modifying mist parameters only exists in
Radzilla, not in Radiance Classic now afaik). The first option seams to
be more realistic with Radiance Classic - so the formulae would have to
be translated into a colorfunc, and the near-distance atmospheric
effects could be modeled using mist.

CU Lars.