How'd i end the top of these rocks?

[Dessensce]

Hello! im New to Hammer, and this is my First Attempt at Making a Map. And i dont know how i should End the top of these rocks?

 

[dabmasterars]

make a smooth top if you want an elevation, make rough terrain if you want a big rock. don't be afraid to experiment a little bit. if you don't have any ideas, look at official valve maps and borrow from them