Here's a quick guide explaining what kind of product photos you will need to build your customizer.
You will need high resolution photos of your product. The idea is that you can see the details clearly when you cut out the different customizable areas. Once you are done, you can resize your final images for web to approximately 1200 x 1200px, 72dpi.
If you are planning to apply colors dynamically over your product. A lightly colored product usually works better. Avoid black or dark colors if possible.
You need one photo for each view you want to show. We recommend 1 to 5 views.