[Radiance-general] Re: physically-based landscapes

[Carsten Bauer]

OK, even I got it now ... :-)

the whole problem is quite a nice example in terms of understanding. In fact, 
the spheremap nonsense is simply the projection of the fisheye view onto an 
object. (the latter certainly unnecessary in this case)

when it comes to picture mapping, one quickly thinks of putting a texture or 
something onto an object, in the current case this would be like hanging a 
photo of the view outside in front of the window ( or a windowless wall to 
cheat the people..) this of course works only from one point of view.

The procedure outlined in Gregs example differs form this, in the way that the 
colorpict is used to modifiy - or in fact to create the *angular*  
distribution of a lightsource which is put in place of the window pane 
(comparable to the luminous intensity distribution data delivered by 
luminaire manufacturers). This angular distribution then is of course 
independent from the point of view, as it should be. 

OK, this all is self evident and not worth to be mentioned at all for the 
experienced scientists, but  - - -  

Carsten