Astronaut by Poly, licensed under CC-BY (source)
Barramundi Fish by Microsoft, licensed under CC-0 (source)
Damaged Helmet by theblueturtle_, licensed under Creative Commons Attribution-NonCommercial (source)
Horse by mirada for ROME "3 Dreams of Black" licensed under CC-BY-NC-SA (source)
Shishkebab by Poly, licensed under CC-BY (source)
whipple_creek_regional_park_04_1k.hdr by HDRI Haven licensed under CC0 (source)
RobotExpressive by Tomás Laulhé, licensed under CC0 (source)
small_hangar_01_1k.jpg by HDRI Haven licensed under CC0 (source) Originally in HDR format
spruit_sunrise_1k_HDR.hdr, spruit_sunrise_1k_LDR.jpg by HDRI Haven licensed under CC0 (source)
aircraft_workshop_01_1k.hdr by HDRI Haven licensed under CC0 (source)
music_hall_01_1k.hdr by HDRI Haven licensed under CC0 (source)
Contributed by jsantell
Contributed by donmccurdy
Contributed by cdata