Mask/rendering issues

[Captain Jack]

Question: I am roto-scoping the actors teeth. In after effects it looks like the first picture. You can see the tongue and the illusion is much better. When I render the comp it ends up looking like pic #2. The mask covers the entire mouth. Any suggestions?

 

[Victor Nhat Nguyen]

can you list the steps on how you roto it out? go into detail please.

 

[Captain Jack]

I added my background to a comp. Used the roto-brush. Recorded each frame. Adjusted the mask as I advanced each frame.

When I scrub the comp it looks fine. When I render it, the glitch occurs.

 

[Victor Nhat Nguyen]

hmm I need a lot more info. my email is VictorNNguyen12@gmail.com. If you don't mind can you send me a lot of screenshot?

 

[Captain Jack]

Victor, thank you. It must have been a fluke. I went back and redid the roto-scope and it came out fine.