InstantXR: Instant XR Environment on the Web Using Hybrid Rendering of Cloud-based NeRF with 3D Assets

For an XR environment to be used on a real-life task, it is crucial all the contents are created and delivered when we want, where we want, and most importantly, on time. To deliver an XR environment faster and correctly, the time spent on modeling should be considerably reduced or eliminated. In this paper, we propose a hybrid method that fuses the conventional method of rendering 3D assets with the Neural Radiance Fields (NeRF) technology, which uses photographs to create and display an instantly generated XR environment in real-time, without a modeling process. While NeRF can generate a relatively realistic space without human supervision, it has disadvantages owing to its high computational complexity. We propose a cloud-based distributed acceleration architecture to reduce computational latency. Furthermore, we implemented an XR streaming structure that can process the input from an XR device in real-time. Consequently, our proposed hybrid method for real-time XR generation using NeRF and 3D graphics is available for lightweight mobile XR clients, such as untethered HMDs. The proposed technology makes it possible to quickly virtualize one location and deliver it to another remote location, thus making virtual sightseeing and remote collaboration more accessible to the public. The implementation of our proposed architecture along with the demo video is available at https://moonsikpark.github.io/instantxr/.