Discovered from a Derpibooru thread, since DA has changed their image links, it's now possible to obtain a larger resulution than what is openly available for download. Take this link:

https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/intermediary/f/5714f9d4-adb6-4ab0-9457-025c1afebdf3/dcupr3b-4f7ade6a-afb8-4b67-8cff-d86c72fbde0c.png/v1/fill/w_600,h_749,q_80,strp/why_s_this_everywhere__by_slb_creations_dcupr3b-fullview.jpg

The image is 600x749. If you delete everything from /v1/fill onwards, you'll get this:

https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/intermediary/f/5714f9d4-adb6-4ab0-9457-025c1afebdf3/dcupr3b-4f7ade6a-afb8-4b67-8cff-d86c72fbde0c.png

Which is 2192x2735, closer to the full resolution of 2950×3680. This only gives images up to a certain dimension, which means absurdres images won't be able to be obtained in their full size, but it's better than nothing I suppose. I'm not sure if this was already discussed here.