洞壁画 · 工作室级演绎

A cave painting of a [subject], rendered with primitive ochres and charcoal lines on a rough stone wall. Smudged handprints, crude geometry, and flickering torchlight add a primal, ancient mood.。工作流：生成多张候选后再做 best-of-N 筛选，可避免一次性出图的不稳定。