hello: I am trying to use the transparency option in the bild format. it seems that: .transparency 0.3 .sphere 0 0 0 10 results in a sphere however .color 1 0 0 .transparency 0.3 .sphere 0 0 0 10 results in a black image, it only works if transparency is set to 0. any suggestions what i am doing wrong? thanks, keren.