Dynamic lights go THROUGH walls

[Barry]

I just saw when I played Doom2 in GZDoom with lights and brightmaps enabled, that the lights go through walls. Well, at least that's what it
looks like. I don't think this is a bug, but I don't know where else I should post it, and I don't know if anyone has ever posted anything like
this before. I can think that something like this can happen, because GZDoom does not support shadows, because that would probably make GZDoom to large to download and to small if it supported something like that. Here are the screenshots that I took, I hope I did it right this time.
http://i50.tinypic.com/wwhush.jpg: Look at the left side of the screen, the BFG's green light goes through the wall there.
http://i48.tinypic.com/2mxicew.jpg: I fire the BFG at the right side of the wall, and it goes through to the other side of the wall. Look there
where the small medikit is lying at the left side, there the green light of the BFG is shining where I think it shouldn't.
http://i49.tinypic.com/2qtxtlv.jpg: Here is a easy picture, there is a fire burning at from the left side of the wall, but then the light goes
through to the right side. I definitely never saw something like this in the real life before. I don't want to bother anyone with this, I just
wanted to see if anyone ever saw or thought about this before. If you have ever played Half-Life 1, I think I can recall that the same thing
happens there too.

[Graf Zahl]

No need to report something that was closed countless times before again.

[Barry]

Now I see, in the post made a few days before, it says that it can't be fixed. I'm going to look and see if I can't find some more bugs in
GZDoom.