Texture name of bgkrd at end of game?

On doom2 when you beat the game it tells you that you won on that screen with the text what's the name of the texturemap background they use for the messages?

You mean when the monsters dance around? The goat head?
It's called "Bossback". It's not a texture it's a graphic.
Open the wad with WinTex and press the GFX button.

NO I mean the texture/flat that they post the story text on, not the ending monster

It's either RROCK17 or RROCK18