Aha noted No problem!
I meant for these, it looks like you're panning your tiling trail texture along your UV's but to achieve the nice fade at the right hand side of the trail it (and a little bit at the front) you'd need transparency on the vertex colours at these points.
I started trying to work out how I'd achieve something like that on my trail effects, but I've since figured out that this is precisely how Unity's trail effect works - I didn't realise it gave me access to colours/transparency at set point along the trail
I'm sure this is done differently in different engines but I'm guessing this is possible, and generally how it's achieved across the board?
Thanks again for the great tut! I coincidentally watched the LoL art panel last night and realised I recognised your name, fun moment