ZDoom

The easiest way is to highlight these 3 files

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and drag them onto the desktop icon for gzdoom-4-14-2-windows

other means of loading the mod:
https://zdoom.org/wiki/Installation_and ... n_of_ZDoom

Just a quick followup:
Normal polyobjects are as tall as the ceiling.
If you want to prevent that then a 2-sided control sector is needed.
See this Thread with an example,

or perhaps something like this example.

Make the poly door linedefs twosided

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No luck on my end either.
However, this image seems to depict the scene from MAP01 of Dwango6. In that context it makes sense to assume that la-list928.wad is comparing the score of various sessions.

It is strange though that session 928 is missing from this list.

Not sure if this will help, I use Opera. I seem to have hit a lucky streak, the last 3 days I could log into the forum without problem. Previously, more often than not, no connection could be established. When that happened I had to go into settings and untick Proxy Server and tick Automatically ...

SuaveSteve wrote: ↑Sun Aug 03, 2025 9:31 am ...., I want to change lighting in steps of 8.

The simple answers is no.
In vanilla DOOM/BOOM the brightness is effective only in steps of 16.
For steps of 8 you have to map in UDMF.

the custom items or monsters did not show up. You mention actors, plural. As I touched on in my post, actors need to have a unique doom editor number, which is supplied in the DECORATE definition. ACTOR CrackoDemon 5123 https://imgur.com/X1A5hNB Without that number UDB cannot see the actor. Maybe ...

In the case of new actors like monsters, weapons, decorations, etc. you will find that Ultimate Doom Builder is useful only after the actors have been created with either Slade3 or a text editor like Notepad++. Once the actor has been created then UDB is useful in populating a map with such actors ...

In a nutshell: To start with, there are a number of Doom map formats, https://doomwiki.org/wiki/Map_format https://doomwiki.org/wiki/Map_format and source ports https://doomwiki.org/wiki/Source_port https://zdoom.org/wiki/Source_port and it seems that every beginning computer programmer is dead set ...

imagine wrote: ↑Wed Jul 09, 2025 5:53 pm The next question I've just faced:
what's the grey circle in the zenith? I see it with my custom sky as well as I saw it with the original DOOM sky texture.

I have no idea and don't even want to guess.
Please, provide a link to the map.

This sky in your map is not a skybox but just a sky image. To have a new sky image in your map MAP01.wad (UDMF), all you need to do is import the sky image with Slade3 and name it RSKY1 https://imgur.com/v5AlK3x However, there are a few caveats you need to consider : some source ports do not support ...

It's easily doable

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It could be that your problem is the doom2.wad which came with the gog download,
KEX DOOM2 engine vs classic DOOM2 engine.

Compare the file size Version 1.9 is 14,604,584 bytes with the one on your harddrive.

Kinsie's Reelism 2 version 1.23hf2 works well with GZDoom 4.14.2, with no other files (like id24res.wad extras.wad) loaded. https://imgur.com/qWwDy3N Also works well with the addon Reelism 2 - Piter's Reel Fudge Pack.pk3 Here is my logfile: Log started: 2025-06-24 16:37:31 GZDoom version g4.14.2 W ...

From your screenshots I cannot tell what exactly you did, but constructing a platform (62 or any other, see the wiki)

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is not really that difficult:

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example pwad