Character Animation Character Rigging and Skinning 2

Question 1

What is a 'blend shape' (or morph target) used for in character animation?

Accepted Answer

Storing alternate mesh shapes that can be blended to create expressions

Answer

Blending two skeleton rigs together

Answer

Creating smooth transitions between walk and run cycles

Answer

Adjusting the skin color of a character

Question 2

What does 'weight painting' mean in 3D character rigging?

Accepted Answer

Painting per-vertex influence values to control how bones deform the mesh

Answer

Applying color to simulate the weight of a character's clothing

Answer

Painting textures that simulate muscle bulges

Answer

Setting keyframe weights to blend animations

Question 3

What is the purpose of a 'pole vector' constraint in an IK rig?

Accepted Answer

To control which direction a joint bends, preventing unwanted flipping

Answer

To limit how far the IK chain can reach

Answer

To snap the foot to the floor automatically

Answer

To mirror IK animation from one limb to the other

Question 4

What is a 'driven key' (Set Driven Key) in character rigging?

Accepted Answer

A relationship where one attribute automatically drives the value of another

Answer

A keyframe set by a physics simulation

Answer

A keyframe that cannot be edited by the animator

Answer

A key pose defined as a template for the rig

Question 5

What does 'gimbal lock' mean in 3D animation?

Accepted Answer

A situation where two rotation axes align, causing a loss of one degree of rotational freedom

Answer

A rig setting that prevents joints from rotating beyond their limits

Answer

A method of locking keyframes to prevent accidental editing

Answer

A constraint that locks a character to the ground plane

Question 6

What is the advantage of using a 'quaternion' rotation over 'Euler angles' in animation?

Accepted Answer

Quaternions avoid gimbal lock and interpolate more smoothly

Answer

Quaternions are easier for animators to read and edit manually

Answer

Euler angles require more memory than quaternions

Answer

Quaternions are always faster to compute than Euler rotations