Fast Blur effect

When layer quality is set to Best, Fast Blur is a close approximation of Gaussian Blur, but Fast Blur blurs large areas more quickly.

Stu Maschwitz compares the Box Blur, Fast Blur, and Gaussian Blur effects in a post on his ProLost blog.

This effect works with 8-bpc, 16-bpc, and 32-bpc color.

Original (left), and with effect applied (right)