Duplicating masks and separating their layers can be rather counterintuitive when you're working in blender. Here is a little hack I discovered that could help you out if you come across this problem.
Get the smoke asset pack for free: https://calzaath.gumroad.com/l/smoke (USE CODE "SMOKE")
Check out my concrete texture pack: https://calzaath.gumroad.com/l/concrete19
Intro: 00:00
The problem: 00:10
It seems like 1: 00:41
What we CAN do: 00:59
It seems like 2: 01:32
An actual solution: 02:04
