Obvious boundary

Hello~ Guys~ I have a problem here. I tried to make the ground fountain. But the boundary is too obvious. How to make it more natural. Thank you~

Hello,

You have two options - you can either make the simulator large enough to cover the whole frame or you can put some geometry around to hide the edges.

Also, if this is foam, you can reduce its half-life so it would die before reaching the borders and not create such obvious edges.

Cheers!