[Sw1tched]

I have a question that i can't figure out........in the level editor i mean i have made a smalll working map nothing great but.....how the heck do you make a huge area have different textures for outside? like patches of grass here, rock lookin stuff here, craters holes....(i am talking about only using the textures on your brush) Don't tell me when people make open field levels they make 200 brushes for 1 srtip of open grass and dirt??

please help!!!!!!!!!