Uhh im trying to edit the rocket launchers smoke trail

and when you open the VTF file it shows up as all the smoke sprites in one file

so there must be some kind of a grid system that seperates each sprite but after i edited it just looks like it disables the grid system and i have no idea how to bring it back so i can make custom sprites

ill will be happy if some one knows the answer for this

heres a reference pic of the default rocket trail:

do you see how the sprites clip each other? especially the first one

there has to be some kind of a grid

and the last one is cropped right at the same place as the first one

it really annoys me