Okay, so I've had some ideas I've always wanted to try designing. Only problem is, I've stuck to using the pen tool in Photoshop for my previous designs, and it doesn't really allow detail with any great accuracy (To my knowledge). You can check out my designs to see what I mean. I'm curious to know how you can make such detailed designs as http://www.threadless.com/product/607/No_More_Bento There is no way in Hell I could do something so detailed with the pen tool. I could just design images in photoshop using my conventional methods, however, that brings up the issue of image quality. I'm a little confused on the requirements for quality (Image quality, not creative or design quality). Threadless says

"Design your tee in a vector art program such as Adobe Illustrator, or Macromedia Freehand... or design in a raster program such as Adobe Photoshop. If you are designing in a raster program, make sure you design actual size at at least 150dpi. When you are done, transfer your design to the template. If you are using the photoshop template, save off a copy of your design as a gif. If you are using the flash template, publish your file so that you have a swf of your design." So what is the exact definition of "vector art"

and what does it entail? And Raster? What's that exactly? I know 150dpi is dots per inch, but what exactly is needed by way of image quality? I'd like to be able to draw with Pen/Pencil, scan it up, touch it up with photoshop and submit, but do I have to vectorize it? I have Photoshop and Flash at my disposal to use. Please help!