$16 for a *very* non-performant material? If this was intended for use in high-detail scenes, not meant for gameplay, one would generally just use a flipbook animation, or looping HD video texture (both of which are higher quality and available for free all over). I love options, but c'mon, that's pretty steep. $5, maybe. And you can loop in materials, using custom HLSL nodes. Also, there are better ways of doing this, all around. Somewhere on the forums, Ryan Brucks (of Epic fame) himself touched on this. I've personally been working on a cool water material (not "material blueprint", thankyouverymuch) and utility functions, and am close to the quality achieved here, sitting at ~180 instructions with everything "turned on". The kicker? It's pure procedural. No textures are needed. So this is cool, no doubt about that. In my humble opinion though, it's not "good". It doesn't run fast, and it's more complicated than it needs to be.
Lee is right - you can use a gradient effect when you vertex paint in your chosen 3d modelling platform (I've done it in max), meaning the wind effect shifts from nothing to maximum along the length of the leaf/branch/whatever.
I'm fairly certain you can vertex paint the bottoms of the foliage and control the movement using vertex colors along with the wind node. I did this in an earlier project and was able to create a scene with grass that moved less and less as it went down until stationary. I created the grass and painted the vertexes black to red (bottom to top) in Maya.
Check out this set of greebles which is a part of the Polystein Kit. The pack features custom presets of 24 different greebles. Make you models appear more complex, and therefore more visually interesting for $24.
Not enough? Make sure to check out the full Pushing Points Polystein Kit for MODO.
It is a kit consisting of an array of all-quad SubD mesh presets that can be seamlessly added to a model making mesh detailing incredibly easy. This powerful toolset positions, scales, orients and auto-stitches these mesh presets to your active mesh relieving you of the tedious process of doing it manually.
You can also use your own meshes with the Polystein Kit with the help of the Polystein Preset Creator. It is a perfect set for modeling vehicles, characters, weapons, environmental models and more.
You can find more details on the pack here.