Brush Size

[CLOUDspawn]

Is there a way to make the brush size in gtkradiant smaller. So like i can make slimmer platforms and slimmer lights etc? thanks

[Theftbot]

Change the grid size

[AEon]

IIRC, the grid size is set by the keys 1 to 0, and 4 was the default 8u grid (been a while).

You can go below 1u grid size, though I would not recommend it.

[Hipshot]

Don't go below 1.
You can also change the grid in the menu, there you can see what values you change to.