◎ E621 Artists

Don't confuse this with the pack's Danbooru artist/character selectors - the README advertises a "5k+ character/artist database" with real-time search, but that feature belongs to the plain IllustriousArtists/IllustriousCharacters nodes, not this one. IllustriousE621Artists is four empty text boxes. There's no dropdown, no fuzzy search, no autocomplete against a known list. You type the artist name yourself, exactly as it exists on e621.

Why that's actually the right shape for this job

e621 is the furry imageboard whose exhaustively-tagged, majority-explicit archive is where a big chunk of Illustrious-family furry and NSFW capability actually comes from - Pony Diffusion V6 XL leaned on it heavily, and NoobAI XL added e621 on top of Illustrious's Danbooru base specifically to widen that coverage. Two things follow from that. First: plain Illustrious v0.1 only understands Danbooru tags. If you're generating on stock Illustrious, e621 artist names typically won't do anything useful - this node is really for NoobAI-based checkpoints and their merges, which is where e621 vocabulary actually resolves to anything. Second, e621 maintains an opt-out list (artists can request their work never be posted there at all), so an artist you know from elsewhere in the furry art world may simply not exist as a trainable tag no matter how you spell it - there's no error for that, the model just won't respond to a name it never saw.

The fields

Four required strings, all free text: Artist (Primary), Artist (Secondary), Artist Aliases, and Artist URLs - the tooltip gives wolfy-nail and dimwitdog as example primary-artist values, which is the exact lowercase, underscore-separated format e621 itself uses. Optional prefix and suffix strings let you splice the result into a longer prompt chain, matching the pattern every other generator node in this pack uses.

Output is a single string, labeled E621 ARTIST TAGS - just your inputs concatenated with whatever prefix/suffix you supplied.

Installing it

Search "EasyIllustrious" in ComfyUI Manager and install from there - the author's own recommended path. Or manually: cd ComfyUI/custom_nodes && git clone https://github.com/regiellis/ComfyUI-EasyIllustrious, then pip install -r ComfyUI-EasyIllustrious/requirements.txt in your ComfyUI environment, then restart.

What actually goes wrong here

Because there's zero validation, the failure mode isn't an error - it's a prompt that quietly does nothing. Typos are the biggest one: e621 artist tags are exact, lowercase, underscore-separated strings, and a small spelling difference just means the model has never seen that token and treats it as noise. If a name you're sure is well-represented on e621 isn't showing up in your output at all, check you're running a NoobAI-based checkpoint rather than plain Illustrious first - that's the more common miss than a typo. And if you're chasing a specific artist's style and getting nothing, it's worth a quick search on e621 itself to confirm the artist has enough tagged work there to have actually influenced training, rather than assuming the node or the checkpoint is broken.