skies/day.hdr: "Kloofendal 48d Partly Cloudy (Pure Sky)" by Greg Zaal and Jarod Guest, Poly Haven, CC0 1.0 (public domain)
https://polyhaven.com/a/kloofendal_48d_partly_cloudy_puresky
skies/afternoon.hdr: "Qwantani Afternoon (Pure Sky)" by Greg Zaal and Jarod Guest, Poly Haven, CC0 1.0 (public domain)
https://polyhaven.com/a/qwantani_afternoon_puresky