Illuminance Levels Inside Building Outlines

When calculation photometrics, why are foot-candle/lux values displayed inside the outlines of my buildings?

If the outline for your building is drawn using the Insert Photometric Solid: Line command, it will not be considered a closed shape and illuminance values will appear inside the building, as shown below.

Instead, draw the boundary using either the Insert Photometric Solid: Rectangle or Insert Photometric Solid: Shape command.

If Starting Elevation is set to 0, illuminance levels will not appear inside the building, as shown below.