In BitmapMaterial.as, applying a ColourTransform to the texture only uses the R, G, B & A multipliers of a ColourTransform object. This is in contrast to the ColourTransform defined in http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/geom/ColorTransform.html which also uses offsets to the colour values, permitting both gain and lift modifications to the colour.
Is there a reason why the functionality of the former is limited in this way?
