anisotropy? |
number |
0.4 |
How much more light a mote sends on along the light’s way than back toward it, so dust between the camera and the sun glows, as the anisotropy of Unity’s and Godot’s volumetric fog: 0 sends it every way alike. 0 or more, under 1. |
color? |
ColorRepresentation |
a pale warm white, #fff3d6 |
The mote’s colour, lit by the light it hangs in. |
count? |
number |
600 |
How many motes fill the box round the camera. A whole number, 1 or more. |
distance? |
number |
8 |
Metres the box reaches from its middle along x and z. Its middle stands half this ahead of the camera, so most motes are in view. Above 0. |
emissiveIntensity? |
number |
0 |
How much of color the mote gives off on its own, on top of the light it takes, as three’s emissiveIntensity: 0 for dust, about 2 for a spark. A mote that gives off light still shows only where light falls. 0 or more. |
height? |
number |
4 |
Metres the box spans up and down, centred on the camera’s height. Above 0. |
minLight? |
number |
0.1 |
The light straight from a source at which a mote shows whole, in the units a light’s intensity takes: under half of it the mote hides, so a mote in a dim light, such as the moon’s, stays hidden however dark the sky. 0 or more. |
minLightRatio? |
number |
1 |
The light a mote needs to show: the light it takes straight from the sun, the moon, a lamp or a light mask’s fill light, over the sky’s light at its place. A mote shows whole at this ratio and shrinks to nothing as the ratio falls to none, so the motes thin out at a shadow’s edge rather than end on it. Above 0. |
size? |
number |
0.015 |
Metres across one mote. A mote is never drawn smaller than one and a half pixels, so a far one never crawls. Above 0. |
turbulence? |
number |
0.2 |
Metres each mote strays from its path, each its own way, as Unity’s Noise module and Godot’s turbulence stray a particle. 0 or more. |
turbulenceSeconds? |
number |
8 |
Seconds one stray takes: about 8 for dust, under 1 for a moth’s flutter. Above 0. |
twinkle? |
number |
0.3 |
How far each mote’s brightness pulses as it turns, 0 to 1. |
velocity? |
readonly [number, number, number] |
[0, 0, 0] |
Metres per second the whole cloud moves, on top of the wind, such as sparks rising. |
windShare? |
number |
0.02 |
The share of the look’s wind speed the cloud moves at, down the wind. 0 or more. |