This particle product is triggered, there's 6 different falling backgrounds that fall behind your avatar like a curtain, good for photo effects and the likes. Make sure your client is on direct3d or gl graphics

The trigger words are:

effect1, effect2, effect3, effect4, effect5, effect6

Developers, 6 effects in total, Particles can be added like normal textures, if you like to manually add particle names are 

particle0.png, particle1.png, particle2.png, particle3.png, particle4.png, particle5.png

The first 3 particles have illumination turned on, so they glow, the last 3 are not illuminated.

Keep your particles small, 128x128 is like MAX size for them 32x32/ 64x64 is more common.