ZDoom

fixed

That's the cause. I created a DECORATE duplicate and placed it directly into the map. The message is output when a thing is spawned from the map data but not from an in-game spawn function.

It should be changed because it really shouldn't be necessary to put the mana sprite into the WAD. That's what the invisible TNT1 sprite is there for after all.

How do I generate this problem/ message?

I have quite a few maps that use the bat, leaf and fog spawners in Doom2. I just checked and I do not have any MAN1 sprites and yet my spawners work fine with Zdoom 47i, 63a and 96 and there are no console warning messages. The spawners are all put into the map using spawnspot.

22

Considering that this may be useful in Doom and Heretic as well I think it should use the neutral TNT1 instead of MAN1 as its sprite. It is invisible anyway and refusing to spawn it just because it uses such a non-intuitive sprite doesn't make much sense. The same is true for the bat spawner and the leaf spawner.