1. A system, comprising: a processing resource; and a memory resource storing machine readable instructions to cause the processing resource to: generate a model of a three-dimensional (3D) object from a pre-scan of the 3D object; analyze the model to identify a property of the 3D object predictive of a reconstruction of the 3D object; generate a categorical tag that describes the identified property based on the analysis, wherein the categorical tag is based on similarity between the 3D object and the model; automatically adjust, without user input, a scan parameter utilized in a subsequent full scan, including a rotation angle, to improve similarity between the 3D object and the model based on the identified property; and display the categorical tag.