What does the Radius refer to when applying a blur effect?

The radius in the context of applying a blur effect directly pertains to the size or strength of the blur. When adjusting the radius, you determine how much the edges of an image or layer will be softened, creating a more or less pronounced blurred effect. A larger radius results in a more extensive blur, spreading the indistinctness over a broader area, while a smaller radius creates a subtler effect. This adjustment is crucial for achieving the desired visual outcome, whether it’s a gentle softening of details or an extreme diffusion of forms. Understanding this concept allows for effective manipulation of the blur effect to enhance storytelling or visual appeal in animation and design.