An exemplary scene customization system detects a selection, by a user, of a customization scheme to be applied to an original immersive scene throughout a scene customization session to be experienced by the user by way of an artificial reality device. The system dynamically generates a custom immersive scene based on an application of the selected customization scheme to the original immersive scene by receiving data representative of the original immersive scene, developing a dynamic volumetric model of the original immersive scene based on the received data representative of the original immersive scene, identifying one or more objects included in the original immersive scene, and replacing the one or more objects with one or more custom objects in accordance with the applied customization scheme. The system also presents the custom immersive scene to the user by way of the artificial reality device throughout the scene customization session.