Flat or hilly sand beds

[Basile]

Ok i just put my sand in my tank and i hate it its flat as aparking lot. before i had small tanks but now with a 6 ' tank it make a difference and i find that the even bottom looks, well flat. Is it possible to make hills without making a DSB by accident and the trouble it brings, thats my concerns. It like to make some kind of different levels without the problem of the DSB , anyone tried that. Thanks for your input.

















This is in my display refigium where i'm trying to do a wavy thing but not sure with the DSB, what do you think?