Kwik does not offer a particle system (to create things like smoke effects). For that you will need an external library like Particle Candy. Regarding rain, there are different ways to create rain (after all, there are different kinds of rain drops):- you can use the Multiplier feature- you can use sprite sheets- a particle system- an external library - more on this "Geek meeting" http://coronalabs.com/blog/coronageek/corona-geek-hangout-53/
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