The newly arrived female subordinate Zheng Miao clearly had excellent skills and aesthetics, but that didn't mean everything was all set after she took over the specific tasks.
The green skin of the frog's head wasn't just about the green patterns but also about the texture of the skin itself, something Lin An couldn't clarify to Zheng Miao in the same way he did with the patterns; he had to adjust as he went along.
The depiction on a spiritual level had its own rules, magically capable of giving viewers a shock to the soul.
That kind of shock actually exists in real life too, only it's much harder to capture and use directly like the presence of spiritual animals.
For instance, the pure eyes of a child—if you were to cut out a picture of those eyes and place them in the eye sockets of a puppet or a doll, it would likewise elicit an eerily pure reaction.