It appears that the skybox needs to be redefined for the two_towers map, as it breaks that game when you try to do `/map Two_Towers'
could not read map packages/base/Two_Towers.ogz
could not load side lf of sky texture skyboxes/philo/sky3
could not load side rt of sky texture skyboxes/philo/sky3
could not load side ft of sky texture skyboxes/philo/sky3
could not load side bk of sky texture skyboxes/philo/sky3
could not load side dn of sky texture skyboxes/philo/sky3
could not load side up of sky texture skyboxes/philo/sky3
could not load texture packages/textures/default.png
In Two_Towers.cfg we must redefine which files are the skybox.