# SHADOWPLANELOCATION System Variable [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [System Variables](Help%20System/GSTARCAD/2022/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2022/System%20Variables/S/(S).md) **Function Description:** The SHADOWPLANELOCATION system variable is used to control the location of an invisible ground plane used to display shadows. | | | | --- | --- | | Type | Real | | Saved in | Drawing | | Initial value | 0.0000 | The SHADOWPLANELOCATION value is current location on Z axis. The ground plane is invisible, but it can project and receive shadows. Objects under ground plane can project shadows by ground plane.