Digital stages for presenting digital three-dimensional (3D) models are described. A service provider system, such as a content creation service provider system, supports generation of digital content based on incorporation of digital 3D models of objects into digital 3D environments. In particular, this model incorporation and digital content generation is supported by configuring 3D environments as “stages,” which are implemented using data that describes characteristics of the digital 3D stages (e.g., background imagery, environment geometry, lighting, stage cameras, and so forth) according to a schema. Due to such configuration, the service provider can expose digital 3D stages for selection, incorporate digital 3D models at predefined positions within selected stages, and present views of incorporated models via the stages from predefined cameras. The service provider system thus enables client device users to simply select predefined positions and cameras, rather enter code to program 3D environments for presenting 3D objects.