"Edges" around transparent textures

So I was trying to make some light beams to attach to a vehicle that faded out. So I made a texture with a gradient from white to transparent, fully transparent on the bottom end, and attached it to the outside of a tapering cylinder.

The thing is, I ended up with a really faint but noticeable white edge around the base of the cylinder, where it should have been transparent. I put a transparent texture on the base and got this. I then put a script in to turn the base to 100% alpha but the same thing happened.

Now, in the end it turns out to not be practical to have these on a vehicle anyway because you can't have phantoms attached to non-phantoms (and I don't want to be knocking people over with my lights - this is something that needs to be sorted out though IMO). But I was curious as to why this is and whether there's any way of getting round it.

I can't remember the technicalities of why it happens other than it being the other edge of the image wrapping round.

What I can tell you, though, is that you can fix it by decreasing the repeats for the texture ever so slightly (to 0.99 or something).

this seems to come up alot and since i dont have a good awnser try serching the texure forum for halo's

yeah i see this as well. it's not a matter of the white fringe problem, it actually appears to be a wrapping problem (the other edge of the texture being brought around as if you had repeated your image 1.01 instead of 1.0).

You can do AJ's technique of a slight decrease of the repeat, or what I often do is change the offset the smallest possible amount.

Whew! I thought I was going nuts. I had just noticed this with a new build and was noticing some colors from the one side of the texture showing on the other side. It was just a sliver (less than a pixel). I thought there was a glitch with my source files and I scanning my them in PS for some mistake. This saved me a lot of fruitless searching.

The other thing you can do is build your textures with some "slop," since they will always wrap like this. Just put a few transparent pixels on all sides before uploading, and when it wraps, it'll wrap transparency.