I am using gensky ( Code given below) to illuminate an outdooe scene. Camera
is looking upward.
When i render the scene using rpict into hdr. Why I am able to see the sun
but not sky ? I comes out to be black.
Gensky only produces the distribution function for the sky but nothing
it is applied to. The "sun" is created as a source but not the sky
dome (see below).
# gensky 3 7 10:30CET +s -a 57.013056 -o -9.988333
# Local solar time: 9.98
# Solar altitude and azimuth: 22.4 -32.9
# Ground ambient level: 11.1
These lines are just comments with useful stuff about the sky. The do
not contribute to the scene.
void light solar
3 5.49e+06 5.49e+06 5.49e+06
solar source sun
4 0.502204 -0.776482 0.380614 0.5
These two groups define a 'light material' called 'solar' and apply
this material to the geometry type 'source' to produce the 'sun'.
void brightfunc skyfunc
2 skybr skybright.cal
7 1 5.04e+00 1.02e+01 3.47e-01 0.502204 -0.776482 0.380614
As above this group defines a material that describes the light
distribution over the sky dome. What's missing is a geometry it can be
applied to. I assume you have used gensky on the command line and
saved the output to a file. Add the following lines at the end of the
# basic glow material for sky; brightness is defined by 'skyfunc'
skyfunc glow skyglow
4 1 1 1 0
# sky dome: 'source' type with skyglow material covering upper hemisphere
skyglow source sky
4 0 0 1 180
# material for ground; use same brightness function but reduced to 10 percent
skyfunc glow groundglow
4 0.1 0.1 0.1 0
# apply 'groundglow' to source covering the lower hemisphere
groundglow source ground
4 0 0 -1 180
# end of sky and ground description
On Sat, Mar 13, 2010 at 5:11 PM, Brajesh Lal <email@example.com> wrote: