Hi! First off, awesome work! The function looks like this: activeDocument.activeLayer.adjustLevels(0, 255, 1.0, 0, 255); Does that help? Please post some ingame shots of this when its done!!
Some browsers for 3ds Max: http://www.scriptspot.com/3ds-max/scripts/tags/browser Some for Maya: http://www.creativecrash.com/maya/downloads/search?search=browse&x=0&y=0
You have to matte it yourself. For some reason apple feels reflective looks better. Just google it, https://discussions.apple.com/thread/2720452?start=0&tstart=0