Has anyone seen this before?

[Nick]

I'm sure that I have seen a labyrinth level with permanent walls;I'm not so sure whether it was in vanilla. Could have been FAangband.

FAangband does not have this. It's V, and labyrinths can have either permanent or non-permanent walls.

[Spacebux]

Hm, maybe light room spell should increase range with level and eventually become a LoS -effect at high levels? Priests have clairvoyance which lights up entire dungeon, giving light spell a bit more power would not be game breaking change.

Tiny problem with that though would be waking up every monster in sight.

If the light spell or scroll effect were doubled, say, on cavern levels, I don't think that would break the game, either. But, as you also pointed out, it would wake that many more mobs. Eventually getting to a LoS-effect would be a nightmare 'q' code-wise, wouldn't it?

[Timo Pietilä]

and that the central labyrinth which is mapped in the picture actually can't be mapped by magic means.

Is it permanent? Can you do stair creation or level teleport? Alter reality? Destruction?

Because those would be my means to survive there. Boring level wont become interesting by making it annoying. You need to add some sort of reward so that there is actual reward to do all that stuff, like navigating that tiny maze or avoiding teleports to get to stairs faster.

If I start from up-side and am near the stairs I would simply take them to get out of there. If I start from the other side I take those stairs. I would not bother to go to that maze-section at all if I know that other side of that is just as boring as this side is.

[Timo Pietilä]

I'm sure that I have seen a labyrinth level with permanent walls;I'm not so sure whether it was in vanilla. Could have been FAangband.

I think I have seen that as well. Didn't make maze any less annoying though. Trap doors, teleport level etc. Only good thing in those is that they are usually quite small and if there is some summoner unique they provide quite good environment to deal with them.

[Nick]

Is it permanent? Can you do stair creation or level teleport? Alter reality? Destruction?

Because those would be my means to survive there. Boring level wont become interesting by making it annoying. You need to add some sort of reward so that there is actual reward to do all that stuff, like navigating that tiny maze or avoiding teleports to get to stairs faster.

If I start from up-side and am near the stairs I would simply take them to get out of there. If I start from the other side I take those stairs. I would not bother to go to that maze-section at all if I know that other side of that is just as boring as this side is.

You'll just have to wait and see