Doomsday Engine

As we can see in the picture, into the map E1M1 from Ultimate doom, infront of the player is a brown or black wall, and its lighter into the left side.

Is maybe a texture failure? No, it is, if i get closer i can pass trought it, and on the other side was a barrel and some other stuff.

Last Doomsday Release
Updated IWAD
Using Resource pack for doom/doom2 (disponible into the site)
using texture pack (disponible into the site)

Also, it happened on the same situation, back of the player.

----------->Bug reported.
----------->Good luck finding out what is.

----------->End.