A second Radiance technical note has been posted
and is available for download here:
Its self-explanatory title is: "How to Generate Renderings
Using Arbitrary-Shaped Clipping Surfaces".
Why not post a reply if you found it useful?
-John
-----------------------------------------------
Dr. John Mardaljevic
Senior Research Fellow
Institute of Energy and Sustainable Development
De Montfort University
Scraptoft
Leicester LE7 9SU, UK
+44 (0) 116 257 7972
+44 (0) 116 257 7981 (fax)
John Mardaljevic wrote:
A second Radiance technical note has been posted
and is available for download here:Its self-explanatory title is: "How to Generate Renderings
Using Arbitrary-Shaped Clipping Surfaces".Why not post a reply if you found it useful?
I for one find this useful. Coming from Lightscape, I'm quite used to being able to create renderings that have invisible backfaces, as you have shown in Figure 4 of this new tech note. It's a useful technique in certain situations, and now I know I can apply it to Radiance renderings as well. Thanks John, and to Greg for supplying the brain. =8-)
John Mardaljevic wrote:
A second Radiance technical note has been posted
and is available for download here:Its self-explanatory title is: "How to Generate Renderings
Using Arbitrary-Shaped Clipping Surfaces".Why not post a reply if you found it useful?
I have played with similar ideas in the past, thinking about how
to implement such a feature for Rayfront. The thing that caused
me to push it into the long term queue was that I found no really
elegant way to emulate the pixel sampling and jittering of rpict,
short of actually modifying it.
Nonetheless, I think that the concept as such is the right way to
go. I'm just waiting for one or both of "-vcm <modifier>" and
"-vco <octree>" to be implemented directly in rpict, which would
preserve all the functionality... 
-schorsch
--
Georg Mischler -- simulations developer -- schorsch at schorsch.com
+schorsch.com+ -- lighting design tools -- http://www.schorsch.com/