are these several different spheres, or just one sphere that you have mapped out and created transmaps for? i realise you said you cut the holes, so i'm assuming that it is several spheres, but i'd think transmapping could offer greater possibilities [possibly?]... for example: take the idea of leaves mentioned above to create a dappled lighting effect - if there are hypothetically two trees at different distances away from a figure, then the amount/depth of shadow wouldn't be universal/uniform... this would be easily compensated for via tranmapping... also transmapping could be used to turn off/on the top & sides of your sphere should someone desire whatever effect to be given on a floor as opposed to a wall... or creating the possibility for combining effects/patterns... you could also create little transmapped smart-propped panels that would parent to a particular light [course i guess the trouble with that comes with folks making sure that their lights are named the same as the parented name in the file...hmm...] neat idea w. your spheres... if you do decide to do a second set, i'd like to cast my vote, per se, for shadows that would be cast from more natural things like trees and such to add variety to possible effects :))