Okay listen.
When i checked danbooru tags, there is cave paint
so before, i'm so curious and tried the prompt but not success. Then, i made model that boost that prompt.
used 1.0-0.8
CFG: 2-3.5 (no need high cfg)
Step: 20-24
Sampler: Euler/Euler aif you use below of that sometimes they look like human/living thing in cave.
Work on less prompt (no need long prompting), but give different result when detailed prompt. Just try it 🙌✨
SDXL ver.
This model more give mud and charcoal paint rather painting on rock wall. Also good on less setting
Illustrious ver.
This model might focus on minimalism content and focus to main object. if your main object human or animal, the background will not much detailed.
If you add detailed background it will look like sdxl version.