may be simpler (better) waysbut i'd do two layers, one of which was the 'UV' layer, the other the normal, and just play about with the light levels on the two layers.
(,
Sun 9 Mar 2008, 15:22,
archived)
cheersI shall try the colour purple first
(
Ptolemy the man with the silent pea,
Sun 9 Mar 2008, 15:25,
archived)