With this filter, your image (active layer or selection) looks like a kaleidoscope. This filter duplicates your image in many copies, more or less dimmed and split, and puts them around the center of the image.
If checked, parameter setting results are interactively displayed in preview. Scroll bars allow you to move around the image.
That's the number of copies you want to apply to image. This value varies from -32 to 64. Negative values invert kaleidoscope rotation.
You have two arrangement modes for copies in image: