1) In animation, a shape deformer that changes the shape of one object into the shapes of other objects. In other software packages, known as morpher.

2) In frame animation, a way of combining two clips together to form a clip that is colored or lit differently.

3) In painting, the influence of the shading or shape of a brush on the next brush chosen.

4) In modeling, a transitional surface that connects two surfaces, creating a particular aesthetic effect.