High!

During the process of getting together the astronomical data for my 
Solar System project ("PoVSolar"), I usually also find albedo values for 
the various planetary objects.

Now my question: as the albedo value gives the percentage of incoming 
light reflected from a body, is it correct to assume that HSL brightness 
values directly correspond to albedo (I know that there are different 
ways to compute astronomical albedo, but for the time being, I would 
stick to the basic definition), so that a dark grey asteroid with an 
albedo of 0.04 would be best modeled as rgb 0.04? (Yes, I've also 
already heard of a PoV macro to convert HSL vectors into RGB vectors, 
within colors.inc, if I remember correctly...)

How can I adjust the overall (=average) brightness of a bitmap texture 
to a certain value? Can it be done within PoV-Ray or should I better 
relay on GIMP to do this?

See you in Khyberspace!

Now playing: I've Been Losing You, Extended Mix (a-ha)

Yadgar

Post a reply to this message