Gimpimpressionist is already included in gimp but with a preview too poor and microscopic to be of some utility
with a simple hack i multiplied the hardcoded preview size from 100x100 to 600x400 offer a much bigger preview.
..here you may see the difference!
would be possible with some knowledge of C a much better preview:
quoting schumam "I'd like to see implementations of these plug-ins as GEGL-ops, preferably using existing ones where possible (http://www.gegl.org/operations.html). This would allow real-time previews in the image window itself - check out the Fractal Explorer op of the GEGL tool, for example."
a real time preview for this as for the other filters crippled by microscopic preview seems a excellent improvement i hope someone will try soon to apply to this old but still excellent plugin
in the time-while i hope my, trivial but somehow effective hack may help
NO BINARY YET SORRY
only source code, no windows or other OS binary yet
I hope somebody will help soon with compiled versiosn but i can't make prevision