In this object. The problem I'm having with certain faces of the same cube. There are faces of that cube that look properly and other faces like those of the roof that I am having this failure. I have tried to recreate the texture and material of those faces but I still have the same problem.
In this other model. My problem is in the texture of a plane. I have tried to duplicate the plane and rotate it so that the texture can be seen on both sides. In this case the gates of the entrance. They are only seen from the outside. But from the inside they are transparent.
I know they are two basic things in 3d modeling. But I'm starting in this world. I have seen and returned to see the tutorials I found on YouTube. "including" the tutorials that SCS has on its official website. But at the sight is that something escapes my knowledge because I can not find the solution. Greetings and thank everyone.