For Mew's special Z-Move, does it take into account the added damage boost from Psychic Terrain?

Question

So, according to Bulbapedia, Mew's Z-Move, Genesis Supernova, creates Psychic Terrain as an additional effect, but does Genesis Supernova benefit from it or is it created after the move is executed?
Just curious :/

Answer 1

The psychic terrain is created after dealing damage.
source