This question already has an answer here:
five month old newbie who's having some fun, here. I've been experimenting a bit, and got a problem. I was following this tutorial from Zacharias Reinhardt on how to create massive background forests via alpha channels. Seems to me to be the best method there is, if you're aiming for not too much processing. https://www.youtube.com/watch?v=BtUS8QTsVZA
And then I got stuck in the node editor when removing the black alpha channel part of the png. I'm 99% certain I did everything exactly like Zacharias showed in the tutorial, but somehow, I'm getting a somewhat different result? And yes, RGBA was selected during export of the original file.
I've added a screenshot of the section in the tutorial and a screenshot of what I've got on my screen. Any help would be greatly appreciated! :)