| Skybox | The filename of an image to be displayed on the sky in Spring. Skyboxes are stored as DirectDraw Surface (DDS) cubebox images, and should be placed in the maps directory of the compressed sd7 file. If no skybox image is specified, the skybox will be generated in Spring from the sun/sky/cloud colour settings. |
| Sun colour | The colour of the sun in the sky. Press the button to change the colour. |
| Sky colour | The colour of the sky. Press the button to change the colour. |
| Cloud colour | The colour of the clouds. Press the button to change the colour. |
| Fog colour | The colour of the fog. Press the button to change the colour. |
| Cloud density | The fraction of sky covered by clouds. Values range from 0 (no clouds) to 1 (all clouds). |
| Fog start | The distance from the camera at which the fog starts. Values may range from 0 (fog starts at the camera) to 1 (fog starts at far clipping plane). |
| Min. / Max. wind | The minimum and maximum amounts of energy that will be produced by wind generators. |
