Recommended settings:

Positives: masterpiece, best quality,
Neg: lowres, worst quality, low quality, bad anatomy, bad hands, 4koma, comic, greyscale, censored, jpeg artifacts
Dimensions: 1536x1536 / 1248x1824 (Portrait) / 1824x1248 (landscape)
Sampler/scheduler: Euler A - AYS
steps 27-32
CFG 6
Clipskip 2

Since we need to make it clear, these are the settings i've tested on. The resolution/dimensions are those provided by Onoma AI for Illustrious v1.0.

I haven't done any extensive resolution exploration on 1.0 yet, I made something for myself so i'd be assed to train loras for 1.0 or 1.1, or whatever the model winds up settling in on and getting a finetune for.