Lighting an Exterior Daylight Scene - Photographic Rendering with V-Ray for SketchUp - page 135

The sunlight color
The first thing we will examine is the coloration we are getting from the sun. At this
moment in time, we are getting a little bit of a warm, yellowish tint to our lighting,
which shows up very clearly on the plain grey material applied to the geometry.
Of course, we do need to remember that the V-Ray Sun and Sky are a physically ac-
curate, automated system, and so the colors we are already getting from the sun are
based on the coloration that we would get under clear sky conditions at the times of
day and year that we have set. However, every artist will most likely want the ability
to exercise at least a measure of control over how the color elements in the scene
are currently working.
The question we need to answer then is, how much control can we exercise over
the color of our direct sunlight while making use of the TexSky environment lighting
map? Well, in essence, we have two controls in the TexSky map that can be used
to make color alterations. It does need to be said though that if we are not careful
in our use of them, we can potentially create a situation whereby these controls ac-
tually end up cancelling each other out, possibly even creating anomalous effects in
our renders at the same time.
The two controls we are interested in are Turbidity and Ozone.