fishmanlee said:
i believe Matt Bush (sp?) created that poster (i believe he used a combination of photoshop and "analog" painting)
EDIT: My bad, it was done by Pete Vilmur: http://www.youtube.com/watch?v=c1zK1ef-LOQ
Actually you had it right the first time, heh, Busch even signed it at the bottom! I believe Vilmur helped with the overall design in conjunction with Busch from beginning to the final Lucasfilm-approved product (which according to the video that follows the one above, should be available as a full size poster).
[off to do more research...]
- Berban