The square in the picture is the place where mural patterns are used uniformly. You must light the mural pattern to trigger the reward.

There is no day in the palace under the abyss, so there is no day and night. But there is a difference between "white night" and "constant night". The environment and system of Xia Yuan Palace will show different characteristics in Flat Night and White Night.

The "eternal light barrier" in White Night will be lifted in Constant Night, and vice versa.

The phenomenon of air distortion encountered in Xia Yuan Palace is generally called "illusion of sun burning", which will dissipate or occur with the difference of day and night.