rotoscoping
I recorded a video of me lighting a candle. Then when I put it into After Effects I used masks to trace around my movements in short intervals to create this rotoscope style. Then I made 2 new block colour layers one with a lighter colour and one with a darker shade of the same colour. Then I made it so the lighter colour was completely opaque which showed the darker colour underneath and as the video went along I proceeded to make the lighter colour less opaque and therefore the background seemed lighter. This gave the effect that as the candle was being lit the background became lighter.
Lily 