Rauru built the Temple of Light inside the Sacred Realm, and it was the doorway to the real world. When you went through the doorway, you would come out on the other side, which was the Temple of Time. The Temple of Time was the doorway between the real world and the Sacred Realm. Once Link pulled the Master Sword out of the Pedestal of Time in Ocarina of Time, the doorway between the two realms was opened. When Ganondorf entered the Sacred Realm through the Temple of Time, he came out in the Temple of Light. The point I'm trying to make is that the Temple of Light is not in real world, it is in the Sacred Realm.

Every time a Great Cataclysm happens, a Hero is destined to appear. He is the one chosen by destiny to defeat the evil force that has risen against the good people of Hyrule. If the evil force defeats the destined Hero, then no one can save Hyrule from the destruction of the evil one.

There are four Heros mentioned in the whole Legend of Zelda series:
1. Hero of Time
2. Hero of Hyrule
3. Hero of Winds
4. The last of the Heros is the Hero that the Book of Mudora talks about. The hero is the one that is supposed to appear on Cataclysm's Eve to defeat the evil force that has threatened Hyrule. (See above fact.) He is the Hero of Cataclysm's Eve.

The Chamber of Sages is in the Temple of Light inside of the Sacred Realm.

The Legend of Zelda: Ocarina of Time, was, at the time of its release, the largest game cartridge ever made.

In the end of Ocarina of Time, Zelda does send Link back in time so he can re-live the seven years he spent asleep in the Chamber of Sages. For proof, start a new game in Majora's Mask. In the beginning intro, it shows YOUNG LINK and YOUNG PRINCESS ZELDA talking. So, unless Majora's Mask is not a sequel to Ocarina of Time (which is not possible because it is the same Link and Princess Zelda as in Ocarina of Time, and the Zelda creator told everyone that both games featured the same Link), that is proof that Zelda did send Link back in time at the end of Ocarina of Time. (For more, see Zelda Capital's Zelda Timeline section, and find the end of Ocarina of Time. Zelda sends Link back so that he can warn the young Zelda about the events to come (The Imprisoning War) and tell her how to stop it.)

How good the graphics are are not based on how realistic they look, it is how well and in-depth they make the game feel. If the game calls for realistic graphics, then judge them on how realistic they look; but if the game calls for not so realistic graphics (The Wind Waker), then the game must be judged on how they make the game feel, not on how they look.