texture problem

There have no light in your map. As i can see and the fps is very low, which means you maybe don't have light_environment. For now if in the map doesn't have any skybox then instead a ceiling, make a blocks with texture "SKY". The second thing is to put light_environment from "Entity Tools". After rendering if you think it's too dark, then you can add some "light" from the same menu.

Here is some tutorial about this:
https://www.youtube.com/watch?v=aZ0SdGeDPKY ( for light_environment )
https://www.youtube.com/watch?v=2tJnmchUbqQ ( for skybox )

problem is solved. thank you guys