Pset_ShadingDevicePHistory Shading device performance history attributes. IfcShadingDevice IfcShadingDevice TiltAngle The angle of tilt defined in the plane perpendicular to the extrusion axis (X-Axis of the local placement). The angle shall be measured from the orientation of the Z-Axis in the local placement. Tilt Angle Azimuth The azimuth of the outward normal for the outward or upward facing surface. Azimuth