I don’t know where I got this from but here are some notes I had buried in my hard drive. I am guessing this is an answer to a Q&A with Disney animators who worked on Tangled.
Having attended Animsquad, I am aware about the importance of eyelashes and I had been told a while back that eyelashes could be animated on a show like Tangled.
Without further ado, here are the notes :
As far as eyes are concerned, for Tangled, We Payed HUGE attention to eye lids. every frame was tuned to Glen’s drawings for the max appeal. Another HUGE things we really spent time on were the eye lashes, Mainly Rapunzel and Mother Gothel. Glen stressed the importance of the lid shape, the tension in the lower lids, the shape of the lower lids, and where the eye lashes were pointing. In Alot of cases we would point the lashes where the character was looking, to help guide the viewer’s eye and boost the appeal of the character. I think the eye lashes and lid shapes are something really overlooked alot of the time, But these are HUGE tools that can be used to gain appeal and to show what the character is feeling.
Also some people think its the rigging. The rigs for these characters were very simple when it came to mouth and eye shapes. For the eye lids we only had three controls for the edge of the top and bottom lids, two corner controls, and open and close rotation controls. sometimes Less is more with controls, It makes it harder to get lost in the rig.
Hope that helps!!! On behalf of the crew, Thanks for the great comments!