Template:F6 Matte Filter

From VFXPedia

Selection of the Filter that is used when blurring the matte.

This option applies a Box Blur effect to the whole image. This method is faster than the Gaussian blur but produces a lower quality result.

Bartlett applies a more subtle, anti-aliased blur filter.

Multi-Box uses a box filter layered in multiple passes to approximate a Gaussian shape. With a moderate number of passes (e.g. 4), a high quality blur can be obtained, often faster than the Gaussian filter, and without any ringing.

Gaussian applies a smooth, symmetrical blur filter, using a sophisticated constant-time Gaussian approximation algorithm. In extreme cases, this algorithm may exhibit ringing; see below for a discussion of this. This mode is the default filter method.