Do you want to go crazy with decals and dirty up stuff like this ...
Houston .. we have a problem .. look at the mess on the floor where the decal overshot its target! Sure you can add "surfaceparm nomarks" to every shader you don't want to receive a decal, but am I doing that? Yeah, right ...

So I went through to see how "_lightmapsamplesize" entity key works and added a "_nodecals" key everywhere. Now you can easily exclude any entity from receiving a decal during map compile.
Result = ...

Compiler is here with source code ... www.moddb.com/mods...ls-1-entity-key
Is this compiler right for you? Probably not, I target DarkPlaces not Q3 and use J.A.C.K. as a map editor but the source code changes should transport easy.
I've used q3map2 for 3 years now and I love q3map2!

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Extra credit: I adapted this from Pixabay ... pixabay.com/videos...derstorm-28067/ .. just an animated texture with blendfunc blend.

Some fire ..

Made q3map2 do "-minimap" for Quake 1 ...

Had to compile the Q1 .map sources in q3map2.exe first to get a Q3 bsp. Then did it again with"-minimap"
Edited 38 seconds after the original posting.

Next trick for you :)

• The minimap should only show sections that you have visited.
• Option to have the minimap in a restricted space, zoomed in a bit more, and always pointing in the same direction. The player icon is directional always in the centre of the map and rotates (instead of the map rotating). As the player moves the map moves on the x,y to keep the player in the centre.

The fire and the reflections are very nice. Can the fire be toggled on and off, which then grows and reduce the fire over some predefined time?

Yeah, lots of things I want to do with mini-map.
The idea of only showing sections visited is a little complex, but I actually could do it (with enormous effort), although the fact that minimaps are a 2D representation of 3D is an issue because q3map2 makes them the way they are with all 3D overwriting each other.
"The fire and the reflections are very nice. "
I think the fire is kind of ok. I want far better. Much more to do with fire.

The fire I posted earlier sucks. It was a first attempt and not a bad one ...
Here is fire 2.0 ... using a bit of alpha blended fire particles, a bit of additive blended fire particles and small amount of multiplicative smoke.

Edited 2.57 minutes after the original posting.

Image a world without "_decal" needing a target ...
"target" "_automatic_droptofloor"
You are now living in such a world.

Edited 1.38 minutes after the original posting.