Here is a sample image using five rain cylinders grouped together.  One great thing about this is that the size of ALL the raindrops can be adjusted using the material scale (This is at 30%).  I'm quite impressed - thanks Fixer.

Quote - *"You ARE using the actual "Alpha plane" object and not a simple plane, right? Did you make any changes to your units in Vue?"

*No,TD - it is an alpha plane (with image inverted in alpha) and I've made no changes from the default.

I'd be interested to see what results you got from using my rain image.