Free Sunset and Golden Hour HDRIs
Low sun is the most flattering light in 3D and the reason so many game screenshots are taken at sunset. Long shadows give the geometry shape, and the warm-to-cool gradient across the sky separates objects from their background for free. The catch is directionality: a strong sun in an HDRI casts one hard shadow, so orient the environment deliberately rather than accepting whatever rotation it loads at.
Everything here is free to download from the source site. These results come from Poly Haven, AmbientCG. Licences vary by file and are shown on each card. Nothing is hosted by us, and every link goes to the original page so you get the current version and the real licence terms.
Search all HDRIs in the live asset library →
Using an HDRI in a game
An HDRI is an equirectangular image with brightness values well above white, which is what lets it act as a light source instead of just a backdrop. Every major web engine can load one as an environment map, and doing so gives you ambient lighting and reflections in a single step.
Resolution should be chosen for the job. If the sky is never visible, 1K is plenty, since you're only using it for light and reflection. If the player can look up, 2K or 4K is worth the download. The 8K and 16K versions are for offline rendering.
If you want a sky that doesn't exist in any library, the skybox generator makes a 360° environment from a text description.
Licences, briefly
CC0 means public domain: use it commercially, modify it, ship it, no credit required. That covers everything from Kenney, Quaternius, KayKit, Poly Haven, and AmbientCG.
Freesound and OpenGameArt host a mix. Some files are CC0, others are CC-BY (credit required) or CC-BY-SA (credit required and derivatives must carry the same licence, which is a real constraint on a commercial game). The licence is set per file by whoever uploaded it, so check the source page before you ship.
The complete guide to game asset licences covers what each one actually requires and where teams usually get it wrong.
More free HDRIs
Free HDRI Skies · Free Studio HDRIs · Free Night and Dusk HDRIs
Or search every source at once, and see the complete guide to free game assets for the full picture on where this art comes from and how to use it.