reef rock formation

[glarior]

I want to do something different with the 120g tank and how the rock formation is.... however, I am not artistic and can't figure out what to do. I am going to do a mixed reef setup but do not want to add as much rock as I have in the past. I want something that looks different but supports coral growth. Not much information to go by but give me some ideas please. I can drill the rocks and all that.... I am thinking of growing the back wall with green star polyps too

Also, I am not worried about LR as filtration since I already have that covered by other equipment