Systems and methods of forming articles of footwear using a base footwear structure

A non-transient computer-readable medium containing instructions for causing a computing system to perform the method of:

• selecting a base footwear structure, the base footwear structure comprising a sole structure and an upper, the upper coupled to the sole structure;
• retrieving a model of an article of footwear to be formed from the selected base footwear structure;
• selecting one or more modifiable design elements from a first list of available modifiable design elements stored in the model, wherein the one or more modifiable design elements are design elements to be updated on the base footwear structure to form the article of footwear, wherein the upper comprises an internal support structure comprising one or more reinforcement elements or linings, and wherein the one or more selected modifiable design elements includes a selection of one or more structures that define the one or more reinforcement elements or linings;
• selecting one or more add-on design elements from a second list of available add-on design elements stored in the model, wherein the one or more add-on design elements are design elements to be added to the base footwear structure to form the article of footwear;
• updating the model based on the one or more selected modifiable design elements and the one or more selected add-on design elements;
• and
• generating the article of footwear from the updated model.