Tag: facial animation

The Basics of Facial Animation

AnimSchool instructor Scott McWhinnie starts the discussion on facial animation by breaking down the face into its three main components, the eyes, brows, and mouth. 

When learning to animate, most students will slowly build their knowledge over time and, typically, facial animation is saved for an advanced level. This can lead many new animators to approach facial animation with fear and trepidation. However, just like the rest of the body, the face can be animated successfully by employing the 12 principles of animation and approaching the process thoughtfully and intentionally.

Speed

Eyes and Lids

  • Pupils and lids move very quickly, typically 1-2 frames for movement.
  • Eye darts
    • Note that eye movements are typically very jumpy (unless tracking a moving object) because the eyes need to “lock onto” something
  • Blinks
    • Down movements are quicker than ups
    • Try to offset the movements to help relieve the robotic feeling

Scott McWhinnie uses examples from The Incredibles 2 to demonstrate how quickly each part of the face moves as well as how they influence one another by counting the amount of frames used for each action.

Brows

  • Brows can move slower than the eyes
  • Typically move sharply but can move intentionally slower
    • At times this could have jumpy movements if moving slowly
  • Generally staying in 3-10 frame range for speed, but can depend on the situation/context – not as hard of a rule as with the eye speed

Mouth

  • Variation in speeds – depends on the situation/context
  • With lip sync, things are going to move fast
    • This is why animators try to live within an expression and animate the lip sync within that pose rather than changing the whole pose of the mouth
  • Hold the M, B, and P shapes for at least 2 frames
  • Try not to have the mouth open up for just one frame and then close (sometimes the closed shapes don’t always have to be closed all the way)
  • If the mouth moves very slowly (which it can), it will feel more deliberate and purposeful

Understanding how the major facial components independently move while influencing one another will allow an animator at any skill level to improve how they approach facial animation.

Watch the full clip from an AnimSchool lecture here: 

At AnimSchool, we teach students who want to make 3D characters move and act. Our instructors are professionals at film and game animation studios like Dreamworks, Pixar, Sony Pictures, Blizzard & Disney. ⁠Get LIVE feedback on your Animation from the pros. 
Learn more at https://animschool.edu/

Posing the Mouth in 3D Animation

Whether you are animating a complicated Lip Sync or just posing a character to look their best, there are two details that are often overlooked: the teeth and the tongue. 

When a character has their mouth closed, their teeth can be ignored. What about when they are smiling, laughing, crying, or any other open-mouthed emotion? That’s when the teeth come into play. 

The answer is simple: don’t get caught up in 3D – take it back a step and think about what looks most appealing. AnimSchool instructor Rohini Kumar explains to approach it as a 2D drawing and think about the small details as a sketch artist would. By combining that perspective with the insight of an animator, you can create more appealing asymmetrical poses that not only look right, but feel right in motion.

Teeth

  • Favor the upper teeth for a smiling or relaxed mouth, lower teeth can sometimes follow the opposite arc
  • Shape the teeth to follow the curvature of the mouth/lips
  • cheat the natural position of t he teeth
    • Seeing the back teeth breaks appeal – rotate the upper teeth to hide the back
  • Create symmetry between the shape of the teeth and the mouth corners
  • Distance between the teeth lines should be similar
  • In more subtle smiles, create appeal by converging the teeth and mouth corners

Tongue

  • Very rare to open mouth and not see the tongue except in extreme angles
  • More appealing to show the tongue than a black gap, but may depend on the shape of the sound
  • Tongue helps to hit your lip-sync, especially when talking rapidly

Rohini explains to treat the tongue like a drawing, rather than a 3D object. Keep it simple – ensure that the curvature of the tongue is clear and that the viewer does not see any extraneous geometry at the base of the tongue, behind the tongue, etc. In a more relaxed position, the tongue can be “cheated” to sit back and tilted in the direction that the character is looking.

Additionally, consider when the tongue may be distracting from the overall animation – Rohini mentions that “N” and “S” sounds can often get away with not showing the front of the tongue flashing in and out to reduce distractions.

Watch the full snippet from an AnimSchool class lecture here:

At AnimSchool, we teach students who want to make 3D characters move and act. Our instructors are professionals at film and game animation studios like Dreamworks, Pixar, Sony Pictures, Blizzard & Disney. ⁠Get LIVE feedback on your Animation from the pros. 
Learn more at https://animschool.edu/