ft-SSIBL for “Screen Space Image Base Lighting” is based on a topic I covered in a previous post about Roy Stelzer’s “2.5D Relighting inside of Nuke”. In this shader I tried to reproduced a few approach found in his Nuke script. So with a Normal pass (object or world), you will be able to do some relighting with a HDR map. The shader won’t compute the 9 coefficients (spherical harmonics) needed for you as describe in this paper : http://graphics.stanford.edu/papers/envmap.
The default value are from the Grace Cathedral, San Francisco Lightprobe http://www.debevec.org/Probes/
Download & Sources
- Pixel Bender shader : ft-SSIBL
- Source code : http://code.google.com/p/ft-projects/source/browse/trunk/PixelBender/ft-SSIBL.pbk
I will for sure add more feature to this one in the future, so come back check it out
How to install it ?
Just copy the .pbk file into your “Support Files” folder in your AE install directory
How to use it ?
How to convert a Light probe into the 9 spherical harmonics coefficients ?