The easiest way to add Smears (Motion Trails) to your scene is to create a simple rig with noise texture on opacity channel :)
Always using this feature in my cartoony scenes.
I also created this simple Motion Trail rig many years ago. It ready for use. Just import it in the scene and follow the instructions
https://docs.google.com/document/d/1A...
Original scene "A little Dr. Jerry" • A little Dr. Jerry
Vimeo: https://vimeo.com/user7293812
YouTube: / medvezana
#3danimation #animation #TomAndJerry #TomRig #JerryRig #smears #motiontrail #Maya