diff --git a/docs/environment.md b/docs/environment.md
index 62d4d1e8..a95e5021 100644
--- a/docs/environment.md
+++ b/docs/environment.md
@@ -83,7 +83,8 @@ An empty default means the variable is unset and its value is determined automat
 | `VGA` | `virtio` | QEMU video adapter model. |
 | `WIDTH` | `1280` | Display width configured in Windows. |
 | `HEIGHT` | `720` | Display height configured in Windows. |
-| `GPU` | `N` | Enables experimental GPU acceleration. |
+| `GPU` | `N` | Enables Helios GPU acceleration. |
+| `VRAM_SIZE` | `4G` | Virtual GPU memory budget. |
 | `RENDERNODE` | `/dev/dri/renderD128` | Render node used for GPU acceleration. |
 
 ## 🌍 Web UI