131 published HDRIs at HDRI Hub carry the sky tag, priced $8 to $99, at resolutions from 4096x2048 to 20000x10000. They range from a plain blue sky to overcast and evening skies, so the choice depends on whether a scene needs a hard sun shadow or soft, even light. Four free sky HDRIs are also available for testing before buying.
















































HDRI Hub lists 131 published sky-tagged HDRIs, priced $8 to $99, at resolutions from 4096x2048 to 20000x10000. Examples include HDR 159 Blue Evening Sky, also sold at 20k resolution; HDR 106 Dawn, a low-sun morning sky; and HDR 133 Road in Hills with Cloudy Sky, available up to 20000x10000. Four free sky HDRIs, from 3072x1536 to 8192x4096, are on the free sky HDRI page.
An unclipped HDRI keeps the sun's real brightness in the file, often many exposure values above the sky, which produces sharp, correctly scaled shadows instead of a flat white disc. Rotate the map on its vertical axis to move the sun and change shadow direction and length, since the sun's position is fixed in the panorama. For an overcast sky HDRI, expect soft shadow edges with little directional falloff, since the cloud layer scatters the light before it reaches the ground.