Some of the brushes suddenly become invisible but still solid, so I walk on them blindly. Some others, on the other hand, become illusionary but still visible, so I fall through them.

Quite a lot of brushes are misaligned, so various odd ledges and cracks appear, sometimes player even stuck on them. Some water brushes protrude from the walls.

There's also some bugs with monster placement - I saw an Orb and an Ogre merged together, and also some Dinosaurs placed below the ground.

Some areas are absolutely dark, I think the minimal amount of light should present there.

Keep studying... 

To the moment, I'm very impressed with two maps: start and r3b6.

A strong sense of different reality...

P.S. And, of course, teleport brushes should not appear standalone, they need some kind of portals or slipgates, etc. 

At the time I compiled the maps I only had the compilers, that were available with Thred.
And as I hardly knew what I was doing with the grid settings, I made a lot of errors.
The Thread compiler has no floating point(?) compiling base, so it places all brushes back on grid.

For these reason a lot of things I saw in the editor appeared otherwise in game.
In the end I was already glad all maps were fullvised, although there were severe points.
The pak wasn't beta tested, so there can be doubled placed entities.
The ammu count on SameOlSjo is too low to survive. In some game engines there were entities that fall through the ground, I didn't test them in all games.

I have recompiled half the pak again with the new compilers. Some maps won't compile or only with severe homs which I really concern.
Others I have updated with a static camera, so messages are more easy to gain access.

r3b6-Ames Room, I made when I tried to reach the so-called mathematical idea of a room with two chairs, that look the same seize, but are not and are placed far from eachother.
The startmap is a drawing of my first project drawing of an old medieval chapel. 

Playing end.bsp from Abandon, I felt a strange feeling of deja vu, I remembered I've already played this map a long time ago...

And recently I found the answer:

http://www.primefan.ru/stuff/quake/elden1.zip

That's an old map by Ludovic Texier, named EldenCross. I downloaded it about 13 years ago from ftp.cdrom.com (do you remember this server?), as well as some other pretty good old maps like The Epoch Turning or MadHouse:
http://www.primefan.ru/stuff/quake/madhouse.zip
http://www.primefan.ru/stuff/quake/epoch.zip

Madfox, is Ludovic Texier your real name? I am just confused. 

...just found an answer in the abandon.txt, where you give acknowledgements to

"Ludovic Texier for my morphing of his terrific EldenCross level"

So all the things are clear.

Heh, this pack gives me so many surprises! :-) 

Levelmorpher isn't the end level, but the secret level. I guess you found out , but as there were more people who got stuck in the game I added an overvieuw with all names of the levels.
You can find it here:
http://members.home.nl/gimli/Abandon.txt

When I made the pak I hadn't internet, just some cd's from the BillBoardService.
Some of them had tricks from the QuakeLab which made me decide to build levels around each trick, like exploding walls, real glass, fryer cache, wind tunnels.
It was also there where I found the LudovicTexier level of the Elden Cross, and not to forget Liquid Despair.

It might sound strange, but on these cd's were also levels from Doom and Duke3D. One of them was wrong labelled, I think it was a Duke3D map. When I tried to open it there was an error saying it was no Dukelevel. After some scratching it appeared to be a Quake level.
I have played it, some wide blue level with a strange tower that went down with a big turning round staircase.
After all these years I started to believe I just dreamed it, so I started looking without result. Still searchng as I never saw it anywhere.
My memory of it is so strong I think I can better make it myself again. 

 

thanks, scampbot. ;) 

. 

 

 

Very interesting recommendation spambot! Wow :) 

It might be archived in another link in this, but there's too many posts to go through and see. 

https://www.quaddicted.com/reviews/trail.html