Patent attributes
An animal-breeding mechanic enables the generation of an offspring virtual animal in an online game system by combining features of a male virtual animal and a female virtual animal. Relevant features may include a base color and optional pattern markings with a corresponding pattern color. Additional game aspects may include options for enhancing the likelihood of generating a successful offspring, decreasing the time for generating the offspring, and nurturing the offspring to maturity. Parameter representations for color features enable substituting color values for a specific virtual animal into source artwork to generate a variety of distinctive displays.