Everyday, I walk through this corridor and have always liked the way indirect light of the morning sun pushes against the artificial lighting. Strong vertical columns break the flow of merging horizontal lines on the granite floor. The ceiling has additional checkered lines with stipple. The plain white wall has a stability against all these features. To avoid the clash of mixed lighting, I tested the ‘grunge’ filter of Snapseed app. (iPhone picture, Grunge filter in Snapseed app).