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Creating a large scale explosion using FumeFx

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Date Added: 11th April 2014
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Vikas Nagolkar takes us through the creation of a large scale explosion using FumeFX.



Introduction

In my last tutorial on creating large-scale smoke using FumeFX, I mentioned the concept thermodynamics. Well in this instance, and indeed for any kind of fluid-based fire or smoke effect, it's all related to the core procedures of thermodynamics. The effect I will be creating this time is a stylized large-scale explosion.

So to start, we need to make a small and quick fluid emitter.

Setting up a particle system

This effect has been simulated via Particle Flow. With this technique, even a small amount of particles can create a great effect; it's just a matter of tweaking a few settings. Follow these steps carefully to achieve this effect.

? Hit 6 to open Particle Flow and create a standard flow. Now remove 'Shape, Rotation' from the local event and rename this event as 'PFS_LSE_Engine'.
? Select your global event 'PF Source 001' and make the following changes in its parameters:

o Emission Parameter:
? Logo size: 10.0
? Icon type: Rectangle
? Length: 20
? Width: 20
? Viewport Quantity Multiplier: 100.0%
? Render Quantity Multiplier: 100.0%

o System Management Parameter:
? Upper Limit (Particle Amount): 1000000000
? Viewport Integration steps: Half Frame
? Render Integration steps: Half Frame

Once you have finished adding details to your global event make sure to save the file as 'LargeScale_Explosion_Start'.

Initial events X4: Now we have to create 4 initial events which will drive our explosions.
Moving to the local event (Event 001), make these following changes:
o Birth Operator:
? Emit Start: 1
? Emit Stop: 2
? Amount: 2000
? Make sure Sub-frame Sampling check box is on.
o Position Icon: Place your position icon to 'Volume'.
o Speed Operator:
? Speed: 2000.0
? Variation: 500.0
? Speed Direction: Along Icon Arrow
? Reverse: ON
? Divergence: 84.0
o Delete Operator: By Particle Age (3 / 1).
o Display: Make sure you have display operator placed in your local event 001. You can choose any display mode you want (though Dots is preferable).

Moving to the local event (Event 002), make these following changes:
o Birth Operator:
? Emit Start: 1
? Emit Stop: 2
? Amount: 1500
? Make sure Sub-frame Sampling check box is on
o Position Icon: Place your position icon to 'Volume'.
o Speed Operator:
? Speed: 1000.0
? Variation: 300.0
? Speed Direction: Along Icon Arrow
? Reverse: ON
? Divergence: 69
o Delete Operator: By Particle Age (3 / 1).
o Display: Make sure you have display operator placed in your local event 001. You can choose any display mode you want (though Dots is preferable).
Moving to the local event (Event 003), make these following changes:
o Birth Operator:
? Emit Start: 1
? Emit Stop: 2
? Amount: 500
? Make sure Sub-frame Sampling check box is on.
o Position Icon: Place your position icon to 'Volume'.
o Speed Operator:
? Speed: 800.0
? Variation: 550.0
? Speed Direction: Along Icon Arrow
? Reverse: ON
? Divergence: 45.0
o Delete Operator: By Particle Age (1 / 2).
o Display: Make sure you have display operator placed in your local event 001. You can choose any display mode you want (though Dots is preferable).

Moving to the local event (Event 004), make these following changes:
o Birth Operator:
? Emit Start: 1
? Emit Stop: 2
? Amount: 2000
? Make sure Sub-frame Sampling check box is on
o Position Icon: Place your position icon to 'Volume'.
o Speed Operator:
? Speed: 1500.0
? Variation: 600.0
? Speed Direction: Along Icon Arrow
? Reverse: ON
? Divergence: 55.0
o Delete Operator: By Particle Age (3 / 1)
o Display: Make sure you have display operator placed in your local event 001. You can choose any display mode you want (though Dots is preferable).

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