Creating image product design by distributed users in a true temporal parallel fashion

A computer-implemented method for jointly creating a design of an image product, comprising:

• allowing a first user to initiate a design of an image product on a first device;
• allowing the design of the image product to be shared to mobile devices operated by one or more second users;
• receiving personalized messages from the first user or the one or more second users by a network-based image service system, wherein the personalized messages comprise a plurality of pixels;
• storing personalized messages from the first user or the one or more second users in different layers at a data center in the network-based image service system;
• concurrently broadcasting, by the network-based image service system, changes in values of the pixels to the first device and the mobile devices, which allows an overlay of the personalized messages on the first device or the mobile devices as the pixels are input by the first user or the one or more second users;
• and
• incorporating the personalized messages from the first user or the one or more second users into the design of the image product by the network-based image service system.