Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for presenting an augmented reality presentation. One of the methods includes receiving data for a web page associated with a uniform resource indicator and including data for augmented reality presentations. An augmented reality presentation is selected for the web page, and automatically presented using the data for the augmented reality presentation, and data from a camera included in a mobile device. After automatically presenting the augmented reality presentation, data is received indicating that the augmented reality presentation should end. After receiving the data indicating that the augmented reality presentation should end, the web page is presented.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optimizing three-dimensional models. One of the methods includes determining, for a three-dimensional model of an object to be optimized, a plurality of points on the object that each have at least a threshold likelihood of being a focal point, the object having two or more regions each of which include one or more textures, one or more meshes, or both; identifying, from the two or more regions, one or more non-focal regions that i) each do not include any of the plurality of points, and ii) are a proper subset of the two or more regions; generating, using the one or more non-focal regions, an optimized three-dimensional model for the object with a smaller size less than a larger size of the three-dimensional model; and storing the optimized three-dimensional model in a non-volatile memory.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for presenting an augmented reality presentation. One of the methods includes receiving data for a web page associated with a uniform resource indicator and including data for augmented reality presentations. An augmented reality presentation is selected for the web page, and automatically presented using the data for the augmented reality presentation, and data from a camera included in a mobile device. After automatically presenting the augmented reality presentation, data is received indicating that the augmented reality presentation should end. After receiving the data indicating that the augmented reality presentation should end, the web page is presented.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optimizing three-dimensional models. One of the methods includes determining, for a three-dimensional model of an object to be optimized, a plurality of points on the object that each have at least a threshold likelihood of being a focal point, the object having two or more regions each of which include one or more textures, one or more meshes, or both; identifying, from the two or more regions, one or more non-focal regions that i) each do not include any of the plurality of points, and ii) are a proper subset of the two or more regions; generating, using the one or more non-focal regions, an optimized three-dimensional model for the object with a smaller size less than a larger size of the three-dimensional model; and storing the optimized three-dimensional model in a non-volatile memory.