I followed this tutorial:
Great fun!
However, in my scene view it looks fine:
But the game view is completely different:
This is a default HDRP project with an HDR Skybox added and nothing else. Default Camera and Default Directional Light. I tried adding a single reflection probe. The default color space is Linear.
Any thoughts on how to begin troubleshooting this?
Did you checked which quality settings you use in your build?