Phr00t

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Chroma-Rapid-AIO

like 26

Unlike Flux, Chroma can use a negative prompt, so no need to have your CFG in the sampler at 1. You can try increasing the CFG to 3.5.
The model card from Phr00t suggests 'Use a CFG of 1, 8 steps and sa_solver sampler with the beta scheduler (V3)', so obviously he know his model better than I.
So my advice is just from using straight Chroma from v38 up to v50 which is now Chroma1 HD. Obviously more steps will also help, so try 12 or 16

Choice of sampler and scheduler is extremely important (Your euler ancestral seems to create that frizzy look, even with 16 steps). Below i have made small changes to your file, 16 steps, euler, sa_solver (both with beta scheduler) seem to help. As does tweaking the prompt:

Different schedulers will either bias composition or refinement, so you will need to experiment .

I hope that helps

Thanks, I just followed the examples with the model, yours are much better, thanks.

I recommend a CFG of 1 because it is much faster. Anything >1 will significantly run slower because it will consider the negative prompt (which many times you can do without).

sa_solver/beta can look pretty good about down to about 8 steps, hence recommending that prioritizing speed. More steps will definitely look even better. Thank you for the examples and help @rootey !

I am using NAG for negative prompt to keep CFG 1. I'm still mainly getting anime/drawings out of it. Maybe V3 will be better when it d/l.

Also there is chroma cache for speedup which helps a lot. Sampler is deis/kl_optimal 10 steps.

https://github.com/feffy380/comfyui-chroma-cache

I have issues with anime/drawings too. Adding "Photo" in the prompt sometimes helps. Using this LORA at full strength can help further: https://huggingface.co/Alme995/DatasetTest_Loras_Chroma/tree/main

Please tell me, when I take a photo of an image in Chroma, I often miss limbs (finger, hand, foot...), or if the image is distant, then the hands or feet and fingers and toes are worse than in SDXL, but when I do artwork, no matter what kind, then usually everything is clear, the fingers are in place, there are no blurred limbs, what could this be connected with?