Hello,
My question is:
I have a layer with transparent parts. I'd like to be able to erase its pixels and later anti-erase them (using the Eraser Tool with ALT pressed) without messing the alpha channel. I don't mean to use UNDO. I typically want to anti-erase because it would be convenient for my workflow. When I lay my "anti-eraser" on parts that were formerly opaque, it's all fine.
But the problem is - when I hit parts that were transparent from the beginning, they get covered with black colour.
This is of course logical, because "anti-eraser" covers alpha channel (removes transparency). But if it's by any smart way possible, I'd like to prevent it. I want the "anti-eraser" to never cover alpha channel more than it was originally. If a pixel had, say, 100/255 alpha value, then it'll never exceed that value, so that I could non-destructively erase anything and then bring it back without losing alpha data.
Maybe there's some clever way to achieve that with layer blending modes or layers masks

   

Unstable Territories is a sculpture from Nicolás Lamas that consists of two pieces of reflective material. He cut out the contours of the European map and assembled the parts so as to form a standing sculpture. It is part of a Triennial of Contemporary Art in Belgium : Beaufort 2021.

I've been using GIMP for a long time processing Astrophotography. I've gotten better at it and now I'm ending up with a 955mb image. Gimp has problems with this size of a picture.  Very slow and crashes. I can't change it to a JPG because I loose the processing power of a RAW image. I'm using 2.10.24 on Windows 10. Any thoughts?

I downloaded MyPaint and Krit after getting a Wacom One tablet. And is slowly getting used to them. But I am using GIMP for so long now that I feel like I will try it until I get myself good enough with any other software.

https://github.com/SenlinOS/SLOS-GIMPainter

This set of brushes always looked interesting. I want to take your opinion before trying it. What do you think ? Shall I go ahead with it ? Thanks.

I would like my brush to rotate continuously 360 deg (like a propeller if i can say that) to do something like twisted wires
something like here > https://depositphotos.com/126584858/stoc...wires.html
but I' struggling with the settings I can't get the brush to rotate continuously, I don't know what setting I should check, tried many, but felt all the way down
any suggestion?
   

here is the brush png if you want to try

   

Hello,
I've seen a video where someone exported a PDF file with one layer group per page. Say layer group 1 contains: Text1, Text2, and white background. The resulting PDF in this video has all three components on one page.
However, when I export this example layer group, I get a PDF with 3 pages, one for each layer of the layer group.
Is there a way around this?

I'm using Gimp 2.10.24 and Win10 64 bit.

Regards.

I got the beginner instructions from another forum. Thanks to Racer-x

   

this is my work so far. Sadly, I am not able to imitate the depth. I am supposed to use the text as Bump map, which I do not know how. So I played with colour Levels and Curve. I like this, but a feel of depth would be nice. Thanks.

Procedure so far

1. Text in Black
2. Select grow 1px, fill it with White on a layer below it

Select black and remove it from the white layer so that only the white border remains.

3. Noise > Spread for white

4. Then I am supposed to merge black and white and use it as a Bump map.

Hi, is there any " remove watermark " plugin available for GIMP ?  Thanks.

Hello,

I'm trying to save different selections of an image to separate layers, so that they can be edited independently. This worked fine before, but for some reason my usual process stopped working. What I did before was:

1. Make a selection in the original image
2. Make the selection floating (Right click-->Selection-->Floating)
3. Create new layer from the floating layer (Right click on floating layer-->To new layer)
4. When I wanted to edit the selection, I select the considered layer and Right click-->Alfa layer to selection

When I try to do this now, the selection disappears when I make the selection floating in step number two, and I'm not able to use the alfa to selection option in the new layer.

Any ideas why this is happening? If I create a new image it works fine. I've also tried removing a bunch of much layers but no success.

Many thanks in advance for some clarification on this!

Those who also use Gimp Chat forum already know me (they are probably thinking Oh, my goodness, what's he doing over here? )  I just thought I would give another forum a chance.