Alternative Terrain Libraries

Hi monkeys,
Only a day after @sgold posted this issue, it started to affect me.
Now though the issue is an easy fix, I thought I would take advantage of the moment and find an alternative terrain lib because the one that is included with jME is not really what I’m looking for. I hope for a lib that can produce more or less larger and more vast terrains, now I know about this

But at least on my PC, it is very slow (@jayfella, if you can help with this, that’d be best).
I haven’t seen anything else on the store that’s a good replacement. So if anyone knows a good replacement, please let me know.