Thank you for the compliment Ganderoleg. I'm not too familiar with creating textures but what I meant about seamless texturing was that the textures will tile along a wall without any visual errors/seams (the player will not perceive the texture as being tiled). I agree with you that the corridors should have some variation on different segments but that difference should still blend into the base texture. Maybe a separate sprite can be placed over a wall segment that needs to be visually different.