Well, honestly, by reading twice it really seems you
did try using those extreme numbers, as you say it causes a crash.
The observable universe is about 10^26 metres and the unobservable isn't even as large as 10^156
But I see you didn't get the notification, no shame about that.
The default radius is 6.378e+006 metres, which is 6378000 metres.
So to get a second planet with water do this:
1) Open TG2 and create a powerfractal terrain.
2) Select the node "planet 01" and press "CTRL+D" to duplicate it.
3) Create a watershader and attach it to "planet 01_1".
4) It is likely you will already see water, since the powerfractal terrain will also displace downwards and thus creating dips which result in negative altitudes compared to the default radius.
5) If necessary, double click on the "planet 01_1" node and paste 6378100 as diameter. You have now raised the waterlevel by 100m by increasing the planet 01_1's radius by 100m
This really should work.
Anyway, speaking in general, I think if someone has issues with TG2 and
did find stuff with the search, why not post it there in the relevant thread instead of creating new ones each time? Maybe an idea for Oshyan to create a sticky thread about this.
So has nothing to do with you Zathura.
Cheers,
Martin