What do you believe is causing the ghosting or shadowing? What is the impact on this structure and how might you resolve this problem?

Description

Please include a photo or explain ghosting on a wall or snow / frost shadowing on an actual roof. Your roof or a roof in your community. What do you believe is causing the ghosting or shadowing? What is the impact on this structure and how might you resolve this problem? If you cannot find any problems please address a roof or wall that is built using building science concepts. Please consider attaching two photos, one with no snow shadowing and one with snow shadowing.