Ok, so they're all just stones, and we are looking down on them, but how do they look?

I also adjusted the heather, since it was looking like colour patches rather than actual plants. The upshot of that is that they don't look like quite such a homogenous mass as is natural on a moorland, but I guess I prefer them this way to the way they were.

They're all rocks, Jeff - big rocks, little rocks, tall rocks, thin rocks, fat rocks....😁

Ah yes, but that's a henge rather than a stone circle.

I've gone back to working on the waterfalls for now, but I'll see if I have time.

A bit like this (though these are very raw at the moment and need some roughing up)

This may not be the problem, but check that you have the latest installers for all your software. Things that have been lying around in your download folders for a couple of years may not be all that useful.

All installers should be run as administrator by right clicking the installer.

Make sure you allow CC3+ to open at the end of any installation process where the default setting is for it to open, and that you reinstall the latest update at the very end - even if you've already reinstalled it once early on.