Systems, methods, and computer-readable media are provided for integrating a three-dimensional asset with a three-dimensional model. Each asset can include a base surface and either a protrusion or a projection extending from the base. Once the asset is placed at a particular position with respect to the model, one or more vertices defining a periphery of the base surface can be projected onto an external surface of the model. Then, one or more portions of the asset can be deformed to provide a smooth transition between the external surface of the asset and the external surface of the model. In some cases, the asset can include a hole extending through the external surface of the model for defining a cavity. A secondary asset can be placed in the cavity such as, for example, an eyeball asset placed in an eye socket asset.