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When Graphics Programmers Cook…

December 17, 2009

by John Shedletsky



Renderman’s been in the kitchen, baking up a fresh batch of awesomesauce casserole…

ROBLOX has updated the Sparkles effect and has added a new Smoke particle system!

Some possible uses for smoke in your levels:

  • Jet fighter exhaust
  • Smoldering tire fires
  • Hot chocolate steam
  • Signal flares
  • Smoke grenades
  • Kitchen catastrophes
  • Acursed zombie hazetrails
  • Ghosts
  • Tail pipes of race cars and trucks
  • BBQs


Smoke has a lot of properties that you can play with to create different effects. Here’s a rundown of some of the more interesting ones:

Color – Quite simple. The color of the smoke.

Enabled – If checked, the smoke is “on”. If unchecked, the smoke is “off”. This can be a useful property for scripters.

Opacity – The “thickness” of the smoke. 0 is clear, 1 is completely solid.

RiseVelocity – The velocity of the particles along the Y-axis (up/down). 0 means the smoke hovers and is good for fog. A high number would be good for a signal fire. A negative number can be used to create spooky mist effect.

Size – The size of the particles. Huge particles will slow down old computers.

– Telamon