Hi,
I’m having a weird problem with my particles when they are just a single images vs when I have a grid of images.
Look at these 2 examples with the smoke particle that’s included with Unity:
I took the included smoke particle and made a 4x4 grid of it in photoshop then saved it again and it looks great.
But if I use it as it comes with Unity it looks like this:
…like crap. 
But if I tile the single particle 4 times in x and y it looks exactly the same as the 4x4 grid texture, but if I tile it more or less, i.e 2x2 or 8x8 it looks like crap again.
What am I missing? Why does my smoke particle have to be in a 4x4 grid to look good? The fire particle that comes with Unity looks good out of the box.
The alpha of the smoke particle is well clear of the edges so I don’t see why the particles look like squares in the single particle test.
Please shed some light on this, it’s driving me crazy.