strange problem whith textures

i made some new(?) textures, they appeare well in the 3d view, but when i lauch the game, they disappeare
This is what i have (whith zdoom, but it's the same with doomsday and risen)


What's wrong?

No idea what it could be. But since the problem appears to be in Doom, I'm sure someone can answer your question, so moved this thread to the Editing forum.

Unclosed sector perhaps?

the only solution i've found, it's to change the textures... o_O

You like you forgot to merge the vertexes of the sector with another one that is touching it. Resulting in to linedefs overlapping one another. I think thats what it is. Unless yo dont have another sector there. O_o