Squash and Stretch adds weight and flexibility to objects. A bouncing ball that stretches on impact and compresses when hitting the ground feels alive. This principle can be used for both simple objects and complex characters. In realistic animation, the key is consistency: when an object stretches in one direction, it should squash in another to maintain volume.

Anticipation prepares the audience for action. A golfer pulls back before swinging, and a dancer bends their knees before jumping. Even small gestures, like a glance before a reaction, make movements more believable and engaging.

Staging directs the audience’s attention to the most important action in a scene. Clear posing, lighting, and composition ensure the viewer understands the story. Good staging avoids clutter and makes the purpose of each shot unmistakable.

Straight Ahead animation builds frame by frame, creating energy and spontaneity. Pose to Pose starts with strong key poses and fills in the in-betweens, giving more control over timing and structure. Many animators combine the two for balance between fluidity and precision.

Follow Through means that parts of the body keep moving after the main action stops. Overlapping Action adds realism by letting body parts move at different speeds. For example, a character’s hair or clothing trails behind their motion, then settles after the body stops.

Slow In and Slow Out mimic how real objects start and stop. More frames at the beginning and end of a movement create smoother, more natural motion. This makes actions feel weighted and prevents robotic, linear timing.

Arcs create natural movement. Limbs swing in arcs, and objects follow curved paths when thrown. Mechanical motion may move in straight lines, but organic motion nearly always follows arcs, adding realism and flow.

Secondary Actions support the main movement and add richness. A character may smile while walking, or tilt their head while speaking. These actions should enhance the main idea without distracting from it.

Timing defines the speed and rhythm of motion. Heavy objects need more force and time to move, while lighter ones react quickly. Timing not only follows physics but also sets mood and emotion in animation.

Exaggeration enhances reality to make actions more dynamic and entertaining. It can push poses, stretch timing, or amplify facial expressions. The goal is to keep movements believable while making them more appealing and memorable.

Solid Drawing ensures characters feel three-dimensional, with weight and balance. Animators must consider anatomy, perspective, and form to avoid stiff or “flat” drawings. Strong posing adds life and believability to every frame.

Appeal makes characters interesting and engaging. This doesn’t mean only “cute” or “good” characters. Villains and creatures can also have strong appeal if their design and animation connect with the audience.