1. A solid imaging printer for generating colorized three-dimensional models, comprising: a printerhead assembly having a plurality of compartments, wherein at least one of said compartments receives a model building material from an attached conduit, and each of at least three of said compartments retains a differently colored model building material for applying substantially to a surface of a model generated by said solid imaging printer; and a controller for directing an application of said model building material and said differently colored model building materials for generating said model by a successive layering of said model building material and said differently colored model building materials, wherein said controller accesses model defining information from at least one data file and directs each of said model building material and said differently colored model building materials to be jetted from said compartments on to said model as it is being generated, according to said model defining information; wherein said differently colored model building materials are substantially deposited near or at an external surface of said generated model, and substantially an entire interior bulk of said model is provided by said model building material.