When porting my shaders to PIXIE 1.4.6, the sdrc keeps
giving off parse errors unless I rename one of my
functions from "Environment()" to "EnvironmentEx".
Other renders(Prman/BMRT/3Delight/Aqsis/Air) can
compile the same shader, so I guess maybe my procedure
"Environment()" conflicts with the standard
"environment()" RenderMan API?