From https://concaveearth.net forums ! Sign up today!
https://www.youtube.com/watch?v=koKiXfBC9ak
Over the simple free model https://concaveearth.net/t/free-simple-concave-earth-3d-model-in-blender-includes-a-rotating-celestial-sphere-inside-of-a-transparent-hollow-concave-earth/
Added
Requirements
Download and install Blender https://www.blender.org/download/
Download and install this model from CGTrader
Unzip the contents to your desired location
Open ConcaveEarth.net Free Model V2.blend file and wait for Blender to open and the project to load.
Click Viewport Shading to view the model
Enjoy!