-void SkyBox::load (const char *ffront, const char *fleft, const char *fback,
- const char *fright, const char *fup, const char *fdown)
+void SkyBox::load (const std::string& ffront, const std::string& fleft, const std::string& fback,
+ const std::string& fright, const std::string& fup, const std::string& fdown)