ET's Info-Stew

"The Threshold Alpha command converts semi-transparent areas of the active layer into completely transparent or completely opaque areas, based on a threshold you set, between 0 and 255." That's what the GIMP documentation. Whoopee! So what?

You almost can't seem to find a tutorial that doesn't use gaussian blur. Of course, it blurs surrounding pixels so they bend together more, causing a de-focusing effect.

So you've installed GIMP, you know how to work with the program, and you know a little about layers, filters, and effects. You've found and gone through some tutorials you found on the web and have created a bunch of "test" graphics to make use of some of the more common GIMP capabilities. You want to learn more. You have an itch that The GIMP Documentation pages just won't scratch.