# SHADEDIF System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [S](Help%20System/GSTARCAD/2026/System%20Variables/S/(S).md) ## Function Description: The SHADEDIF system variable is used to set the ratio of diffuse reflective light and environment light. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 70 | When specified SHADEDGE to be o or 1, the SHADEDIF becomes percentage of diffuse reflective light. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/SHADEDIF.html) · © Gstarsoft Co., Ltd.