感觉imagen3升级到后imagen-4.0 or ultra后，生图速度更快了，质量更精细了，但总感觉哪里不对劲 
gpt-image-1
 [1000638837] 
[1000638839] 
imagen-4.0-ultra-generate-preview-06-06
 [1000638840] 
[1000638838] 
提示词 
A breathtaking, ultra high-definition panoramic painting inspired by 'Along the River During the Qingming Festival' (Qingming Shanghe Tu), viewed from a bird’s-eye view (top-down perspective). Ancient Chinese riverside city d...