Photographic sky strips for ФОТО-НЕБО (renderer/PhotoSky.cpp).

All source HDRIs are from Poly Haven (https://polyhaven.com) and are released
under CC0 1.0 Universal (public domain dedication):
https://creativecommons.org/publicdomain/zero/1.0/
No attribution is required; it is given here as a courtesy. The strips were
cropped (upper hemisphere + 11.25 deg), exposure/colour graded (target zenith
colour, local tone mapping of the sun glow) and tone mapped by
re_demo/parity/w17/skybox/convert.py from the 4k (day) / 2k (others) .hdr files.

photosky_noon.png      sunflowers_puresky                   https://polyhaven.com/a/sunflowers_puresky (Sergej Majboroda, Jarod Guest)
photosky_morning.png   syferfontein_18d_clear_puresky       https://polyhaven.com/a/syferfontein_18d_clear_puresky (Greg Zaal, Jarod Guest)
photosky_golden.png    kloppenheim_06_puresky               https://polyhaven.com/a/kloppenheim_06_puresky (Greg Zaal, Jarod Guest)
photosky_sunset.png    qwantani_sunset_puresky              https://polyhaven.com/a/qwantani_sunset_puresky
photosky_dusk.png      qwantani_dusk_2_puresky              https://polyhaven.com/a/qwantani_dusk_2_puresky
photosky_night.png     qwantani_night_puresky               https://polyhaven.com/a/qwantani_night_puresky
photosky_cloudy.png    kloofendal_48d_partly_cloudy_puresky https://polyhaven.com/a/kloofendal_48d_partly_cloudy_puresky
photosky_overcast.png  kloofendal_overcast_puresky          https://polyhaven.com/a/kloofendal_overcast_puresky
photosky_storm.png     overcast_soil_puresky                https://polyhaven.com/a/overcast_soil_puresky (darkened, desaturated)

Authors: Greg Zaal, Sergej Majboroda, Jarod Guest and the Poly Haven team (see
each asset page). License: CC0 1.0 (all of the above).
