Stylized Zelda camp fireplace breakdown

Hello! I love your fire, it looks great! I'm doing something similar right now, but I can't quite crack the code for your fire shader diagram as I can't tell what the alpha of your texture looks like. I know it's been over a year, but would it even be possible to publish the texture you are using? Watermarks are fine, I just can't get your math properly without seeing all 4 texture channels