Lordshiva1948 That example uses particles, i'm looking to avoid using that Thanks for taking the time to help out though.
Hasuak Thanks, it's bit more clear (not that there was anything wrong with Brashmonkey's explanation). Haven't had a chance to try that but will give it a go and see how i get on.
Looking through some of the tutorials, i have found one thats helped.
I've managed to create rain with this tutorial (thanks Bl4ckSh33p) even though it's for snow, I've tweaked it for rain.
I've provided a capx of what i've done, is this OK to replace particles in terms of improving perfomance and memory usage?