Hi JB, sorry gone so long, lot of things were going on. I did some upgrading to the computer with a GTX 1070SC and more memory. The graphic card was so big 11.5" that it hit the hard drive so I had to move it and then the cable that plugged into the hard drive was upside down which made for more problems but got it in only to have another problem like the internet connection was lost (mother board based LAN) . I spent time trying to find the problem but figured that I must have shocked the Intel Lan when I touched the printed circuit board on the back side as I had to remove that panel to move the Hard Drive. I fixed that with a PCI exp Lan. Then I decided to upgrade to more memory, from 8 to 16 gig only I wound up with 24 gig instead. All I can say is when playing 7 days to die, it is soooo smooth now when you turn without any jerking or chatter. I put the vertical Sync back on and now have a solid 60 FPS. Without the sync, it varies up to well over a hundred and drops to the 90s. Figured 60 was just fine as I wanted to crank up everything else and it looks great now.
Anyway, in answer to your question, I'm sure you have found that by now when you downloaded A15 stable. If not, it is the same menu that you use to select a new game of continue and listed as editor about mid way down the menu.
It helps a lot to see what you are getting as I have found some fantastic water worlds which I really enjoy playing, if only I had a boat! I also found one I call the alps as it is full of mountains with little water. Both are great for building in to create some really great game play.
The game now levels up with you creating a bigger challenge as the days go on and the hoards grow in size with various types of Zombies. I watched a few videos where the players had no idea there was some new zombies in the game and were not at all prepared for them. Needless to say, they didn't last long before they died.
I like the random world better as you don't know what to expect for terrain even though you see the preview ahead of time. It only shows the type of biomes you will be getting and the water amount in the world along with how many cities and towns are going to be present. I found one map with 7 very large cities but you have to be really careful now as some cites and towns extend into the radioactive zone and if you don't keep checking your map, you could walk right into one and die before you have a chance to escape it. Especially at night when you can't see that well. Many biomes now have the storms come in and make it really hard to see especially the morning fogs. But that makes the game that much more interesting.
Underground is still viable for a safe place to hold up as well as finding a deep area in water and building a column then widen it at the top as zombies can't swim, at least so far! Everyone seems to enjoy the new version especially the distant view of landscape. Water is improved a lot.