This image was created to show how air flows through this newly designed fan unit. Many layers and transparencies were used.
Thanks Ted,
Yeah, they have a whole bunch of rules and regulations but the big one is no transparencies.
All images must be submitted as an Adobe EPS version 8 format and pure vector, and does not include bitmaps. Many of the "special effects" are either not supported by the eps file format, or are not very reliable. Even gradients can be trouble. So in order to give the customer the most reliable and usable file possible, and not knowing what kind of program they will be using to open the file, they have these very strict standards...understandably.