# 3DCONVERSIONMODE System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [3D](Help%20System/GSTARCAD/2026/System%20Variables/3D/(3D).md) ## Function Description: The 3DCONVERSIONMODE system variable is used to convert materials and light definition into current product version. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1,2 | ## System Variable Value: **0:** it will not convert the materials and light when opening a drawing **1:** it will automatically convert the materials and light **2:** it prompts users to convert any materials and light --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/3DCONVERSIONMODE.html) · © Gstarsoft Co., Ltd.