Which Blend type is used to blend animation motions according to two parameters?

The 2D blend type is specifically designed to blend animation motions based on two parameters. This flexibility allows for the combination of animations along two different axes, providing a more nuanced and intricate control over how animations transition and interact with one another. For instance, in a character animation scenario, one parameter could control the forward motion (like walking or running), while the other could control the direction (like left or right). This type of blending is particularly effective for creating rich, dynamic animations that respond to the player's inputs or game state.

In contrast, the 1D blend type only accommodates blending along a single axis, which is suitable for simpler animations that require one-dimensional transitions, such as transitioning between idle and walking states. The 3D blend type, while allowing for blending along three axes, is other typically more complex and resource-intensive than necessary for scenarios where only two parameters are at play. Quadratic blends focus on mathematical approaches rather than directly applying to the methodology for blending animations in Unity, making them less relevant in this context.