I didn't make it!
I am new to mapping. I made my first brush but I need to know how to change the grid size. Anyone know how to do this?
use the + and - keys on your number pad :) A bit of advice though, try to avoid going lower than 4 units if possible.... this is to try and reduce the possibility of leaks from walls not meeting up etc. Obviously if you need to go into detail modelling then lower than 4 will probably be necessary. :)