I’ve been using Greg Zaal’s free HDRIs from over at HDRI Haven for a while now. But I just found out he’s running a quite successful Patreon campaignand is giving away (CC0) his entire collection of 16k HDRIs!
Great for backgrounds and PBR.
Nope, I rendered one to a cubemap in Blender to use in Quatter. The other times I used HDRIs was also in Blender.
If anyone does create or find a setup like this, please do share.