Before you ask; Yes, the shading will look like that in-game
I went with vertex color occlusion because I didn't want to sacrifice texture quality. I also didn't want to have a ton of unique rock textures that would've just boosted the amount of space the map took up. You get a very similar look (if you have enough geo to play with) and it takes up less space and memory to boot!
I am using this technique and more in my up-coming map. It looks pretty good if I might say so myself
EDIT: I forgot to mention; They are rocks BTW haha









