Here is a dump of (almost) everything I've made using easyfluff+hll6.3 so far:
https://catbox.moe/c/ 74ogn0
It's obviously a huge jump in quality from NAIv1 based checkpoints, here are downsides I've observed:
It's very high quality, to the point where it kind of looks like actual art, lots of images might seem to be missing a lot off telltale signs of AI art such as high contrast. Might just be due to being based on furry art from the start, but it seems "realer". This means that if you have a particular fondness for how the style of your favorite NAIv1 based checkpoint is, it WILL take some getting used to. I for one really liked my custom based mix and I do miss it
It's really hard to get the usual nearly-#FFFFFF skintone that is common in anime. I literally can't do it, weighting pale skin very high gets you close but then the skin is also very desaturated
Most of your results will look like they need a contrast boost, with some exceptions depending on which artist style you're prompting for. The image filters extension works for this and I basically permanently have it on in img2img with just a +1 boost for when I upscale my base images x2, you might also need a color boost
Your mileage with style loras (trained on fluffyrock) will vary, probably a lot. Probably owing to the training model being primarily focused on furry art, style loras are dampened and maybe this can be offset by higher learning rates but I can tell you it's not really offset by adding more epochs
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