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|Ok, we're now ready for
the big moment: animated displacement by swap.
We have the main movie clip, and we have the animated clip of
displacement to simulate rising hot air.
Load your main movie, i.e the one which you want to displace to add a
turbulent rising hot air effect to it. In our example, it's that desert view with the
camera sweep from the Sun down to the sand dunes and motion to the left
If you have it as a DWA (Dogwaffle Animation) file, use menu
Animation > Open...
or else use the AVI loader or
the option in the same Animation menu to load an image sequence.
Or of course if so far you didn't have your base movie clip created,
make one now. Perhaps one of moving clouds on the Sky file?
Then open the Timeline editor as before, from the Animationmenu:
Animation > Timeline...
In the Timeline's menubar (since PD Pro 4.1) you'll find a new option
in the Animation menu:
Use anim as swap...
Use this option to select the DWA file containing the rising bubbles
animation we just created in the prior step and which we saved as .dwa
Select the animation file that contains the turbulent rising hot air
simulation's displacement (greymap)
Now that this animation is selected as the animated Swap source,
several filters in the Timeline will use it, instead of the normal
static image from the Swap buffer.
These include the "Combine with Swap"
filters (of which there are many variants) as well as the "Displace by Swap".
Select the 'Displace' filkter, and make sure that the 'Mac displace'
slider is not at zero.
Then click Render, and you will see, in the preview, that the animated
displacement map is affecting the original animation as it's rendering
the displacement filter's effect with each frame from the selected
Here's what the result could look like
Here's another example:
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