# SHADEDIF 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 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. ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/S/SHADEDIF%20System%20Variable.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/S/SHADEDIF%20System%20Variable.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/System%20Variables/S/SHADEDIF%20System%20Variable.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/S/SHADEDIF%20System%20Variable.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/System%20Variables/S/SHADEDIF%20System%20Variable.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/S/SHADEDIF%20System%20Variable.md)