[jitter] alpha transparency multiple

I haven't looked at your code but a few things come into mind:

1) check rendering order. Transparency only works against objects that are
rendered before the transparent object is rendered. This can be achieved via
@automatic and/or @layer parameters

2) if you wish to manipulate each shape separately, make sure they have a
dedicated jit.gl.gridshape

Hope this helps!

Best wishes,

Ivica Ico Bukvic, D.M.A.
Composition, Music Technology, CCTAD, CHCI, CS and Art (by courtesy)
Director, DISIS Interactive Sound & Intermedia Studio
Virginia Tech
Dept. of Music - 0240
Blacksburg, VA 24061
(540) 231-6139
(540) 231-5034 (fax)
ico at vt.edu
http://www.music.vt.edu/people/faculty/bukvic/