# Shell

A Shell object represents a shell-bomb, which emits a single or multiple particles which can carry further emitters f.e. [Stars](https://help.depence.com/depence-construction/firework/build-custom-effects/stars) or [Tails](https://help.depence.com/depence-construction/firework/build-custom-effects/tail). 

<table><thead><tr><th width="275">Property</th><th width="375">Description</th></tr></thead><tbody><tr><td>Firework Color</td><td>Pre-defined colors.</td></tr><tr><td>Custom Color</td><td>Once the Firework Color is set to Custom, a RGB defined color can be used.</td></tr><tr><td>Lifetime</td><td>Total lifetime in seconds.</td></tr><tr><td>Lifetime Random</td><td>Randomization of the Lifetime in %.</td></tr><tr><td>Enabled</td><td>Enabled the emitter.</td></tr><tr><td>Height</td><td>Maximum Height in meters.</td></tr><tr><td>Count</td><td>Amount of shells to emit.</td></tr><tr><td>Random Direction</td><td>Random direction on every shot.</td></tr><tr><td>Comet</td><td>Visible Comet particle.</td></tr><tr><td>Comet Size</td><td>Size (WS) of the Comet Particle.</td></tr><tr><td>MinPixelSize</td><td>Minimum Size of the particle in pixel.</td></tr><tr><td>Sound Energy</td><td>0..1 value for the sound engine to select different sounds depending on the energy.</td></tr><tr><td>Sound</td><td>On/Off.</td></tr><tr><td>Air Resistance</td><td>represents air resistance (a factor of the res. of a unit sphere at cw=1 and 1kg). <span data-gb-custom-inline data-tag="emoji" data-code="26a0">⚠️</span> too high resistance can cause the particle to not emit, because it would never reach the defined height!</td></tr><tr><td>Random Velocity</td><td>Randomization on the velocity in %.</td></tr><tr><td>Fade In</td><td>How long the particel fades in (% on lifetime).</td></tr><tr><td>Fade Out</td><td>How long the particle fades out (% on lifetime).</td></tr><tr><td>Blink Frequency</td><td>Blink/Strobe frequency in Hz.</td></tr><tr><td>Blink Amplitude</td><td>Blink/Strobe Amplitude in %.</td></tr></tbody></table>

All child objects will be carried by the shell and will be ignited.&#x20;