anything that can be done on a grid can be done more realistically with a ruler and a piece of string. It just takes a lot longer to get anything done. A player can take forever to decide how many tenths of an inch he wants to be away from the orc, or he has to measure his distance from everybody and pick the exact spot that puts him right where he wants to be, or some one bumps a figurine and all of a sudden its not in range of the fireball, but it was before (no it wasn't). Arguments and tempers flare over split hairs, and things can really drag on while each player just gets the distances down, let alone decide what he's going to do.
and no, its not every time that rulers take forever, but theres always that one battle or session where you just leave with a headache.
If your group has the maturity and patience to use a ruler, it will work just as well (if not even more realistically) as any method. but it can REALLY bog things down if overthinking and pettyness creeps in. I've been scarred a little by rulers (in other games, not D&D). Grids are simpler, quicker, and good enough for most players.
and no, its not every time that rulers take forever, but theres always that one battle or session where you just leave with a headache.
If your group has the maturity and patience to use a ruler, it will work just as well (if not even more realistically) as any method. but it can REALLY bog things down if overthinking and pettyness creeps in. I've been scarred a little by rulers (in other games, not D&D). Grids are simpler, quicker, and good enough for most players.