In Doom, the pickup for green armor has two sprites:

and

Of the two sprites, ARM1A0 is clearly the more "glowing" one.
But in the GreenArmor's decorate definition on the ZDoom wiki:
Code: Select all
States
{
Spawn:
ARM1 A 6
ARM1 B 7 Bright
Loop
}
So, in the dark GreenArmor looks like this:

But surely, wouldn't it make more sense for the other sprite to be the glowing one, like this?

The sprites for blue armor are back to front in the same way.
Is this a holdover from vanilla Doom? A GZDoom bug? Have I only just noticed something everyone else is patently aware of? I'm curious.