Mixed reality objects

A method, comprising:

• executing a mixed reality application, the mixed reality application defining a third-party object slot;
• presenting, on a display device, a mixed reality environment via execution of the mixed reality application;
• upon detecting a condition associated with the third-party object slot, sending to a remote computing system a request to fill the third-party object slot, the request based on sensing of a real-world portion of the mixed reality environment with a sensor of the computing device;
• receiving a third-party object from the remote computing system, the third-party object selected by the remote computing system based on the request;
• and
• displaying, on the display device, the third-party object in the third-party object slot such that the third-party object is constrained by a real-world portion of the mixed reality environment.

A head-mounted display device, comprising:

• a display device;
• one or more sensors;
• a logic machine;
• and
• a storage machine holding instructions executable by the logic machine to:
• execute a mixed reality application, the mixed reality application defining a third-party object slot;
• present, on the display device, a mixed reality environment via execution of the mixed reality application;
• upon detecting a condition associated with the third-party object slot, send to a remote computing system a request to fill the third-party object slot, the request based on sensing of a real-world portion of the mixed reality environment with the one or more sensors;
• receive a third-party object from the remote computing system, the third-party object selected by the remote computing system based on the request;
• and
• display, on the display device, the third-party object in the third-party object slot such that the third-party object is constrained by a real-world portion of the mixed reality environment.