Lighting designers lack professional knowledge in building projection and do not conduct detailed surveying and calculation of the building that needs to be projected. The so-called "one drop in the bucket" is a thousand miles away. Once the projector's projection position, orientation, and field of view are offset, it will affect the final viewing effect of the viewer.

Lack of construction of the entire scene and modeling analysis of the lighting environment, lack of precise placement of points at the concave, convex, and flat levels of the building, poor alignment effect of the film source content, and inability to organically integrate digital animation special effects with the building.