Judith Diskin said:
S. Birol Akmeric said:
The thing about painting transparencies (including liquids) is mostly to concentrate on values and colors. Look at the object as if it's not 3 dimensional, try to see the colors (however improbable they sometimes seem to be) as if looking at a flat photo. And you may want to have a look at Thaneeya McArdle's site, especially her advices on photorealistic painting.