While not the sexiest of corals, I'm very happy with my Green Star Polyps.
I had a huge vase coral skeleton from ages ago that dropped and broke. I used the innermost curl as a cave in my current tank.
A while back I glued a few small frags to it in the hopes it would cover it.
here is how it looked a couple weeks after gluing them in place;
and here is how it looks today;
this side was facing the back of the tank, I recently re-arranged to get more growth. It is working.
and where the shrimp is it is growing on the inside back about two inches deep.
and a top down view.
that side was facing the front previously. you can see how full it is and it wraps down around the side.
so I'm pretty happy it is turning out just how I wanted.