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Vapour cone: a frame from a film that uses it.
EffectNew

Vapour cone

A condensation collar flashing around a fast object near the speed of sound, with pale vapour streaming behind it.

Version
1.0.0
Added
23 October 2026
Films
Not used in a film yet

Parameters

NameTypeDefaultRangeWhat it does
mach (Can change over time)number10.6 to 1.5the object's speed as a multiple of the speed of sound; the cloud flashes near 1 and is faint by 0.85 and 1.2Can change over time
atvec30, 60, 22-2000 to 2000where the object is at the moment `passAt` [along, inland, height] metres
passAtnumber50 to 60 sseconds into the shot when the object is at the point above
headingnumber1200 to 360 degcompass bearing the object flies toward: 120 along the shore, across the street view
speed (Can change over time)number10010 to 300 m/show fast the object moves through the picture; real transonic speed is about 300 m/s, too quick to followCan change over time
cloud (Can change over time)number102 to 20 mhow big the condensation collar is around the objectCan change over time
trailnumber0.60 to 1how much pale vapour streams behind the object; 0 none
objectbooltrue–draw a small dark body at the middle of the cloud
tintcolor#f2f6fa–the colour of the vapour
strength (Can change over time)number10.1 to 1.5how bright the vapour is against the pictureCan change over time
level (Can change over time)number0-20 to 60 mheight of the ground or water the effect lies on, over today's sea; follow the sea as it risesCan change over time
seedinteger500 to 99which random pattern the particles fall in

Use it in a film

film.js
elements: { 'vapour-cone': { mach: 1, at: [0, 60, 22] } }

Use it from your agent

Ask your agent to put it in a film. It finds the element by name.