How do I make a semi transparent texture more visible without ruining the actual transparent look to it? I'm making a "breathing" animation that visibly shows breath (so like when you're in cold weather and your breath is visible in front of your face)

The problem is even though I got the breath animation set up correctly you can BARELY fucking see the thing because it is so transparent. The problem is if I make it non transparent then it stops looking like breath and just a white block showing up in front of my face which is dumb. Halp