I want to share my first filter for gimp to create maps on gimp, grass and sea

[yotama9]

Hi, after about a month I read tutorials here about how to create maps, I realized there is no chance I could remember any of them. I toyed a bit with the tools to get something faster which was still quite complicated. Finally, I decided to group my insights into filters. I post here the first one I created. It is simple to use and generally speaking, follow RobA tutorial.

Create a new image (I used and test 500x500 with 200 dpi resolution) and fill it with white color. Then, paint on it with solid pencil with black and fill the area you want to be land. When that is done, apply the filter and wait a couple of seconds.

That's it.

A link to the script page at gimp plugin registry you can download the file from there. I also attached the script here.

The attached figure in black and white is the input image.
grass_in.png
And this is the result
grass_out.png

I would like to here your thoughts and how can Improve this.