A server machine modifies an augmented reality (AR) object in response to fulfillment of a condition. The machine provides, to a user device, object data that defines the AR object. The object data specifies a physical geolocation of the AR object, a presentation attribute of the AR object, a conditional modification program, and a trigger condition for execution of the conditional modification program. The object data causes the user device to present the AR object with a first appearance, located at the physical geolocation. The machine detects fulfillment of the trigger condition, and in response, the machine executes the conditional modification program. This modifies the object data by modifying the presentation attribute. The machine provides, to the user device, the modified object data, which causes the user device to present the AR object with a second appearance based on the modified presentation attribute.