Sadly Heathen's area didn't get eclipsed.

Thats a pretty major graphical glitch there.

Does this really happen?

WOW that is the weirdest glitch I have ever seen in any of the VV games.

Are you sure you haven't been doing anything to the images or installing mods? That looks like what happens when you break the images for the map. I guess it's possible they didn't load correctly when you started the game. If it's now permanently like this, you should try reinstalling the images (by reinstalling the game, unless you have backups of the Images folder).

Is there really an eclipse event? I haven't had this happen and I've played the game through so many times. Thanks for any responses.

Even if there were an eclipse event, it would probably just make the screen darker, like it does when the weather changes. The sections that didn't glitch out look like they are normal brightness, so we can rule an actual event out.

So is it permanently like that or will it go back to normal?

I think that if VVCX's game were permanently like that s/he would have made a post looking for help. I've (very) occasionally seen similar effects, usually while loading or if my system is very busy. They've only lasted a short while. Alternatively, it could be the result of an attempt at a mod that went wrong.

Its not game glitch, my software firewall decided to run VV5 as partially limited so game didn't have access for all resources it needed.

All terrain except water and Heathens area were black..