Looks like you're using model textures, they all have model/ or prop/ in the front of their name, all you need to do is go though your whole map and find every texture you've used with model/ or prop/ at the front and change it for the texture that doesn't have that at the front (they'll have metal/ or nature/ or wood/ ...etc instead)
Fortunately for us valve make two sets of all their textures, model ones and texture ones so its not the end of the world if the texture you like is a model one since there will be a normal one with it.
The second issue is your overbright skies -
http://forums.tf2maps.net/showthread.php?t=2755