During a particular mission on Rannoch, I found myself viewing certain historical videos from earlier in Quarian history.
After viewing one of the videos, Shepard remarks that, given the age of the video, the Quarians should have not been wearing masks. However, I was told by my guide that the video was being drawn from my mind, and I couldn't know what Quarians looked like under the masks since I'd never seen one without it.
However, I believe it's possible to see Tali without her mask on in some iteration of the Mass Effect series. If I had seen Tali without her mask, would this sequence have been different?