Indicates the file likely contains a 3D environment or object designed for VR headsets or immersive web experiences.

If you are trying to open, use, or learn about the techniques used in such a file, these "papers" and guides from official and community sources are the most helpful:

It likely contains a folder with index.html , js files, and a scene.splinecode file.

Likely the username or handle of the designer who authored the asset. Resources and Guides

Many creators on platforms like Behance or Dribbble post their Spline projects; searching for "Jayce Spline 3D" on those sites might lead you to the original project page or tutorial.

You can often find assets like this on the Spline Community Gallery , where creators share .spline files and exported ZIP packages for others to study.