| episode | Episode number |
| sky | Environment map name (skybox), also used for reflection |
| sounds | Music cd track number |
| gravity | Gravity (default=800) |
| light | Set a low value to light the entire map without using individual bulbs |
| message | Map name |
| fogdensity | Fog density for opengl cards |
| fogdensity2 | Fog density for 3dfx cards |
| fogval | RGB values of fog for opengl cards |
| fogval2 | RGB values of fog for 3dfx cards |
| _sun_light | Set sun brightness |
| _sun_target | Defines sun yaw and pitch pointing to a spotlight target |
| _sun_angle | Defines sun yaw and pitch manually (0 to 360) (-90 to 90) |
| _sun_vector | Defines sun yaw and pitch using a X Y Z direction vector |
| _sun_color | Defines sun color in scalar R G B |
| _sun_diffuse | Diffuse light brightness |
| _sun_difwait | Diffuse light attenuation |
| _sun_ambient | Set sun ambient brightness |
| _sun_surface | Set sun surface brightness |