<a href="https://github.com/Lithl/roll20-api-scripts/tree/c" rel="nofollow">https://github.com/Lithl/roll20-api-scripts/tree/c</a>... Custom FX v0.1 Commands !createfx < name > [ properties ] !previewfx [ properties ] !savepreview < name > !endpreview !createfx will create an FX object directly. You must supply a name. All properties are optional (default values will be used for any not specified), and may be labeled or not. Labeled properties take the form propertyName:propertyValue , and the names are case-sentitive. Unlabeled properties will be consumed in order: angle angleRandom duration emissionRate endColour endColourRandom gravity lifeSpan lifeSpanRandom maxParticles size sizeRandom speed speedRandom startColour startColourRandom The four color properties must be specified as an array of four values: [red, green, blue, alpha] . The first three should each be an integer in the range 0-255, and the last should be a number in the range 0-1. gravity must be specified as an object in the form { x: num, y: num } . The spaces are optional, and the x/y can swap their order. Any properties with spaces must be enclosed in quotes. gravity:"{ x: 5, y: 6}" , "gravity:{ x: 5, y: 6 }" , and gravity:{x:5,y:6} are all valid. !previewfx takes the same property parameters as !createfx , but instead of immediately creating the FX object, it spawns a looping FX animation on the map, which you can change with additional calls to !previewfx . You can stop the animation with !endpreview (however, your saved properties will not be erased), and you can save the FX with !savepreview , which will erase your preview properties and create an FX object with the same values. Detailed information is available with !help NOTE: This script has a dependency on splitArgs NOTE: This script currently only functions on the Dev server