If you were looking at making a board, I would cut out the general shape of the mountain(s) out of polystyrene and stack 3 or 4 of roughly (try making it a small "snowman" effect with 1/2 an inch between each edge

) the same shape and glue them together with pva glue (leave same ground space between the mountains, there has to be a place to do some basic killing SOMWHERE ). Then I would take a hot wire cutter and cut it vertically, which should result in a similar texture as the bottom pic.
PS Sorry it's kinda confusing (in fact you probably had no clue what I just said

), but I'm away from all my terrain stuff, and I don't have a hot wire gun to begin with

so I cant really give pics.
PSS I use too many smilies, don't I?