[bbrks]

Try searching at somewhere like wallhaven.cc[1], which aggregates wallpapers with good tagging, colour, size and ratio-based searches.

A lot of the wallpapers there come from other sources like Flickr, interfacelift, Reddit, 4chan (for better or for worse, /wg/ isn't too bad), or just direct uploads.

I wouldn't say credit is preserved particularly well at all times, which is a shame, but it is just a reverse image search away usually to find the original.

[1] https://wallhaven.cc/

[xattt]

A lot of amateur wallpapers have this weird cliché aesthetic. It’s the same two-thirds framing, and (at least to me) some intangible form of unresolved tension or a general feeling of the photographer trying too hard (vs an impromptu shot).

[xanderlewis]

I get all of mine from https://unsplash.com.

[edu]

+1 to unsplash

[jwells89]

Another vote for wallhaven, have found several high quality 5k and 6k+ desktop pictures there, as well as some for odd aspect ratios (e.g. 5k portrait). Its predecessor Wallbase was also great.

One thing I appreciate is that its users do a decent job of tagging images so it’s easy to find all the work of a particular artist or location.