Playing with Fire in Boris FX 6

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In your NLE, look for a button that says something like "Customize" or "Edit" to open the Boris interface. (The reason we have a custom interface is that Boris FX 6 can do some things that most NLEs have no way to represent, like 3D compositing. The details on that will have to wait for another article.)

Here's where we're going to apply the filter, though: not to the *layer* of Video 1 (which refers to the video track in your NLE to which you applied the Boris filter), but to the video contained IN the layer. This is a subtle distinction, but a crucial one that I'll explain later. For now, take my word for it. Click on the triangle next to the layer's name (Video 1 in my illustration) to disclose the Face track. [an error occurred while processing this directive]

With the Face track selected, control-click (or right-click if you've been wise enough to get a two-button mouse for your Mac....or if you're on a peecee....) and select Fire from the New Filters> Natural folder. Your top layer will vanish, replaced by Fire. That's okay, we'll bring it back in bit.

First I want to make a few small changes to the fire. I want it to cover the entire layer, so I'll go to the Fire filter's Shape tab and change the Height and Width to 100. Because I want these parameters to remain the same throughout the effect, I'm going to click in the interpolation box next to the parameter name and select Constant. The size of 100 percent will remain constant throughout the effect.



Step 2
Map layer: the burnt film filter

The last tab of the Fire filter is where we tell Boris that we want the fire to follow the edges of another layer. Check all three boxes. The specific message is that we want to use a Map layer; we want see the media on the Map layer; and we only want the fire on the edges of the layer.



Now, a funny thing will happen here. The wheels of Boris will spin for a while, and it's going to take a few seconds looking for the map. Because we haven't assigned one yet, the flames will disappear. But look--the video 1 file is back! To be specific, the default media for the Map track is Video 1. Click on the disclosure triangle for the Fire filter, then once more on the Map layer, and you'll see Video 1.



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