@slowwalker, There are so many patterns and ornaments in Dae Wung Jeon hall. Side wall of lotus design impressive to anybody. It was especially inspiring one. Yep...First time I see from Korean temple's hall it like you. The dragons most of seen from Korean Buddhism. Wall paintings more meaningful and you well explained like below.

Those paintings represented the process how to reach the enlightenment along to the way of Buddhism.
The most important thing in Buddhism is how to control our mind.
Here the cow was a symbol of our mind.

Yep that's true and believe 100%.