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How to simulate smoke with preroll

4

Daniele De Luca explains how to add 'pre-roll' to your smoke simulations so they'll come into full action straight away.

In this small tutorial we will create a smoke simulation with pre-roll.

The pre-roll that is a cache on negative frames in order to run the simulation for a specified number of frames prior to the beginning of the actual animation.
Because of that, the smoke/fire will be already initiated when the animation starts.

Blender seems to have this feature perfectly working into the cloth simulation tools but in the smoke domain lacks a menu for this simple function.

4 Comments

  1. Kind of pointless... just set the scene starting frame to frame 100, same thing... you can still remove the 1-99 frames from the drive.

    • Yep! It's another workaround but works only if you start the rendering of the scene from frame 100.
      Some could use the smoke simulation into an already motion tracked, composited or animated scene and e.g. the torch should have a fire from the beginning... this is just my case but I think that it could be useful to others to not change the scene start/end or cache frames

      Cheers
      Sparazza

  2. Small note, the preroll in the cloth settings has been broken since forever..

    As a matter of fact, it was recently removed IIRC.

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