snap

My grid snapping isn't working, its not on 1 or anything, it just wont snap on the grid for no reason, help.

Hi there, I'm very new to mapping and currently working on my first proper map (for arena). It's been slow but steady progress with a couple hurdles but going well. Encountered an issue today though that isn't very major but very irritating, it seems a lot of my world brushes haven't perfectly...