Abstract: Methods, systems, and apparatus, including medium-encoded computer program products, facilitate creation and use of customizable three dimensional models. In one aspect, a method includes receiving input specifying one or more controls that modify geometry of a three dimensional (3D) model of an object; converting the 3D model of the object and the one or more specified controls into a program that runs in a publicly available runtime environment to provide a model interface to change the 3D model in accordance with the one or more specified controls when the program is run in the publicly available runtime environment; and publishing the program to an online marketplace for 3D models available for 3D printing.

Abstract: Systems, methods, and computer program products automatically generate and place annotations on an image (e.g., a rendering of a computer aided design model). Regions within an image are identified, and a representation of the image is generated, where the representation characterizes each of the image regions. Annotation leader locations are determined based on the representation of the image. Thereafter, annotation leaders are automatically generated and displayed using at the annotation leader locations.