Thanks for the tip Because my webcam (Logitech Orbit AF) adjusts lighting on its own, I didn't use a lamp for this shot.  My webcam can also adjust brightness, contrast, and colour intensity, so it might be something to do with the settings which I chose.

Yeah, I had a light flicker problem a while ago but I found a setting that allows you to manually adjust some aspects of the lighting while the webcam automatically adjusts the brightness.  I usually animate in the afternoon, so it's pretty bright anyway.

Not to mention clouds moving in front of the sun; that makes the light change even faster.

YES. DESK LAMPS.

That pic (and post) should probably go in the "Pictures of your studio" thread.
This thread is for final frames lifted from an upcoming movie.

I would close the blinds for sure, animate at night as much as possible, and start looking for some thick black curtains.

Totally agree with Pritchard. If you have the opportunity to, move your set to a place without glass walls.

Thanks for the great advice, everyone    I redid that scene at night (using a desk lamp) and it turned out much better, with consistent lighting and no flicker.

(the background is a blue screen)

Thanks!  One of the only drawbacks of animating at night is that the lighting makes the blue screen look purple.  It's okay, this scene takes place in the evening anyway

Finally getting around to doing a full "Misconception" film?
If so, could you please keep it clean? Thanks.

On to the frame itself, the lighting doesn't seem right. There's that one light source, which casts long, odd looking shadows and then has only the one spot on the far right where the bookshelf is lit well. And then the tablet that is glowing but not lighting up the girl's face at all.

The room looks very plain and empty with just the one piece of furniture, I'd suggest at least adding a small table beside it. The objects on the floor seem out-of-place. If the person is slop enough to leave those on the floor, then there would be more things lying around, but if she is neat-freak enough to totally clean the rest of the floor, then why did she leave those there? If you want to kill two birds with one stone, you should add a table and set the items on it.