Generators
Each generator draws one kind of background. A layer’s type names its generator.
| Generator | Id | Description |
|---|---|---|
| Aurora | aurora-fbm | Drifting ribbons of light. |
| Curtain | curtain | Aurora curtains: a bright, swaying lower edge with rays rising out of it. |
| Starfield | starfield | A night sky: twinkling stars, a faint milky way and the odd shooting star. |
| Linear gradient | linear-gradient | A straight gradient through two to four colours, like CSS linear-gradient(). |
| Linear sweep | linear-sweep | A flowing linear gradient through three colours. |
| Conic | conic | Colours turning around a point. |
| Mesh gradient | mesh-gradient | Four colours that drift and blend into each other. |
| Clouds | clouds | Air: cumulus clouds at two depths, lit from one side, drifting slowly. |
| Wind | wind | Air in motion: thin streaks that flow across the canvas and bend in gusts. |
| Rain | rain | Air: falling rain in three depths, leaning with the wind. |
| Lightning | lightning | Air: forked lightning and sky flashes, for storms. |
| Mountains | mountains | Earth: layered mountain ridges that fade into haze, with mist in the valleys. |
| Treeline | treeline | Earth: rows of spruce silhouettes along the horizon, with glow behind them. |
| Strata | strata | Earth: folded sandstone layers that drift slowly. |
| Water | water | Water: moving light patterns on the floor of clear water. |
| Fire | fire | Fire: flames rising from the bottom edge, with embers above them. |
| Grain | grain | Animated film grain, to lay over other layers. |