Toggled Grid on a map during play.

Is there any way to put a grid on the map during game play?

What sort of grid do you need? For example, there was a project a while back that arranged a grid of planes you could click on to move... Im sure you could find several solutions... like make a plane and give it a texture... or customize one of the lightning textures and overlay those... depends on what you need I guess...

if by grid you mean like in the WE, you could use building "splat" textures (i forget the name... the stuff that appears on the terrain below a buildings model) simply a colourd box with an alphad out middle to fit the scale you want, then tile it with walkable buildings.