skybox doesn't double - background below horizon level to be abstract

[kfarr]

v1 attempt

CC0 license
site poly haven, many good images to choose from that are "pure sky"

skies - all converted to sdr 2048w 1024h:

• (as 'day') * sunset (new 'day' background) https://polyhaven.com/a/wasteland_clouds_puresky
• * sunny-morning https://polyhaven.com/a/qwantani_puresky
• * sunny-afternoon (lens flair) https://polyhaven.com/a/kloofendal_43d_clear_puresky
• * cloudy-afternoon https://polyhaven.com/a/kloofendal_48d_partly_cloudy_puresky
• * sunny-noon https://polyhaven.com/a/kloppenheim_05_puresky
• * foggy https://polyhaven.com/a/kloofendal_misty_morning_puresky
• * cloudy https://polyhaven.com/a/mud_road_puresky
• [*] not this time - rotate initial day sky - sun not visible ?
• add credit to polyhaven