Right, this is a long shot, but i came down to an exhibition during the 90s in London. I can't remember which one but sure it was at the Tate Galley. I know I came to see the 'Sensations' exhibition so they may have been there that I saw it? Although doubt that very much.
Anyhow I vaguely remember the painting but I've been searching all over for years to find it so it probably had a bit of an effect on me. From what I remember it looked like a blurred shot of a toy or something from behind, and was all out of focus... and was blue/green and yellow(ish)... the only way i can imagine it is through those little green men from toy story... see link.
http://images.fanpop.com/images/image_uploads/Little-Green-Men-toy-story-478711_1024_768.jpg
If anyone knows who the artist is or where i could find the painting you'd stop m from going crazy!
Thanks, Mike.