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 import the .splinecode or .spline file directly into the Spline App to see how the "splines," materials, and interactions were built. s p l i n e VR.JAYCE.zip
The official Spline Docs cover everything from basic 3D modeling to advanced interactivity and VR exporting. Many creators on platforms like Behance or Dribbble
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. s p l i n e VR.JAYCE.zip