17. The one or more non-transitory computer-readable media of claim 11 , wherein instructions for rendering the image of the custom product comprise instructions for rendering a three dimensional model into a two dimensional graphical image for display by a browser interface.
17. The one or more non-transitory computer-readable media of claim 11 , wherein instructions for rendering the image of the custom product comprise instructions for rendering a three dimensional model into a two dimensional graphical image for display by a browser interface. 19. The one or more non-transitory computer-readable media of claim 17 , wherein the set of one or more render files include declaratory statements for matching to key-value expressions based on set operations.