Does gsp only "carpet" to spread?

[Townes_Van_Camp]

That's pretty much what I'm thinking. If it all grows together, it'll totally lose the effect I'm going for

I've done it on staghorn. This is correct. It looked like a sorta lumpy rock

 

[Munjy]

My GSP what i think you hoping for. Ive done nothing special other than let it grow.

 

[kzenoni]

I have a large rock that started with a little piece. After it covered the rock completely ( about a year ) it started branching out. I will attach pictures opened and closed up.

 

[Coinzmans Reef]

Wish I had before and after shots... oh wait :)
apologize in advance for the horrible pics, I think they make the point though...

you can see the "white-ish/gray" areas, that's the "carpet as you say growing/reaching out. so this thing has almost doubled in sized. It has tried but can not reach/grow down. Not enough light I guess.

The base on mine is dark purple ?