What is this rear glass roof in the base interior?

[coupedncal]

Any ideas what is this rear glass roof in the base trim? Is this a fixed moon roof over the rear seats? If so, does this have a cover to protect against the sun? Or is this an extension of the rear windshield that flows into the cabin and over the rear seats?

This is from the FAQ on the Tesla site.

Which features come standard with Model 3 for $35,000?
Model 3 is designed to be the safest car in its class, with 220 miles of range, and zero to 60 mph acceleration in 5.6 seconds. Standard features also include full self-driving hardware, Supercharging capability, a rear glass roof, a 15” touchscreen display, Wi-Fi and LTE internet connectivity, free over-the air software updates, full LED lighting, and an 8-year, 100,000 mile battery warranty.

 

[blckccat]

I think it's the rear glass over-extending to head room. I wouldnt call it a feature...

 

[Jason S]

The base roof is glass. Not moon roof. Heavily tinted, but still glass.

The Model S version is very nice, though it is a moon roof, and I expect the Model 3 version to be nice too. Doesn't need a shade.
Pictures here: Pictures of production Model 3s

 

[BluestarE3]

Any ideas what is this rear glass roof in the base trim? Is this a fixed moon roof over the rear seats? If so, does this have a cover to protect against the sun? Or is this an extension of the rear windshield that flows into the cabin and over the rear seats?

Not just on the base model, all Model 3s have this large tinted piece of glass that serves as the rear passenger roof and rear windshield. It's the so-called front roof (over the front occupants) that is either metal (base) or glass (PUP).

 

[gambit48]

It's basically like the giant front windshield on the Model X... except stuck in the back