[Fluxus] vec 3/4 vs opacity

[gabor papp]

i've been thinking about how to sort out the 3 and 4 element colour 
vector issue. there's a conflict with (opacity), since alpha values are 
overwritten by the value set with (opacity). what is preferred, should 
we ditch (opacity) completely? or (opacity) could work as a multiplier 
to colour alpha values, but probably this would be more work. if we can 
agree on the preferred way of working, i'd like to take on this task.

gabor