Small tweak to material export: only export as <lambert> when spec intensity is 0...
-rw-r--r-- 37085 CMakeLists.txt
-rw-r--r-- 302 COPYING
-rw-r--r-- 2725 GNUmakefile
-rw-r--r-- 24846 SConstruct
drwxr-xr-x - build_files
drwxr-xr-x - doc
drwxr-xr-x - extern
drwxr-xr-x - intern
drwxr-xr-x - release
drwxr-xr-x - source