How do you recreate the dust flying away from the Pelican when it hovers low over sand? I've been browsing through the effects and shaders folder, but I can't determine which one is used for the sand being blown away by the Pelican's exhaust.

If you're wondering about the title, I'm making a helicopter. And on another note, which shader_transparent_chicago makes the cylinders on the Pelican's engines appear transparent?