layerfx.scm for gimp 2.10 for mac not working

If you save your new GIMP image as a JPG, those transparent pixels will be replaced with your background color again.

In RGB mode, those channels are red (R) green (G), and blue (B).

Pixels can use combinations of these channels, basically mixing colors to make other colors like you did in elementary school.

Combining channels in different ways basically gives you every color of the rainbow.

There are other color models like CMYK, but they work similarly.

A set of basic colors can be mixed together to make other colors.

Without transparency, the only way to erase using just R, G, and B channels is to replace the image pixels with a solid color.

The color used to replace pixels is kind of arbitrary, so GIMP will use the background color to replace your image pixels as a default.

Thats why GIMPs eraser sometimes paints with black, white, or another color depending on the background color you set in the Toolbox.

That means any time you open a JPG in GIMP and try to erase, youll see this eraser not erasing problem.

PNG files do support transparency, so if you open a PNG in GIMP the eraser tool will work as expected right away.

So in addition to R, G, and B, the alpha channel gives your pixels information about transparency to work with.

The ability to make transparent pixels is what allows the eraser to really erase.

It will look like a mini version of the image you have open, or the layer you want to work on.

Its like you have a stack of papers, and erasing rubs holes in a sheet of paper so you can see whats beneath it.

Its not exactly attractive, and it can be kind of alarming when you first see it.

I mean, I know I really dont want that pattern showing up in my image.

Its there because you cant see transparent pixels, so when theres nothing underneath a layer GIMP has to show you something to indicate that theres basically a hole in your layer.

It could show you a solid color like white, but then you wouldnt be able to tell the difference between holes and where you actually painted with white.

So it uses this really obvious checkerboard pattern to make it clear where transparent pixels are.

Youll even see this pattern used to represent transparency in menus and tools.

You can see a little gray checkerboard icon next to the add alpha channel option in the layers dialog.

If you save using a file type that supports transparency (like PNG), your transparent pixels will actually be transparent and theyll allow anything thats beneath that image to show through.

Layerfx.Scm For Gimp 2.10 For Mac Not Working