Cascade - sprite/cpu particle vertex count.

bit of an odd question, but for some research I would like to know if each sprite emitted (non mesh/gpu) is actually on a plane that could be considered a square plane mesh.
and if so, which of the four corners is vertex 1, 2, 3, and 4.

to extend the question, can I manipulate these vertices of the sprite with the world position offset node in the mat editor.