erasing

[adriaannelemans@online.nl]

Just started.  I have an image on wich I paint. When I erase it goes through the whole image and becomes white. How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

[denzjos]

Does your drawing have multiple layers ?

[rich2005]

Quote:Just started. I have an image on wich I paint. When I erase it goes through the whole image and becomes white. How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

It is easy, New to Gimp ? Check with the Gimp documentation first https://docs.gimp.org/2.10/en/gimp-tool-eraser.html ( https://docs.gimp.org/2.10/nl/gimp-tool-eraser.html )

Sometimes a picture helps

   

The erase tool shows white because (1) the background colour is set to white (2) the layer has no transparency, an alpha channel. Add one with Layer -> Transparency -> Add Alpha channel

The erase then shows a checker pattern which is a way of denoting transparency.

If you add a new transparent layer on top Layer -> New Layer and make sure the Fill With is set to Transparency, then you can paint and erase without problem.

[adriaannelemans@online.nl]

(01-04-2023, 08:53 AM)rich2005 Wrote:

Quote:Just started.  I have an image on wich I paint. When I erase it goes through the whole image and becomes white. How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

It is easy, New to Gimp ? Check with the Gimp documentation first https://docs.gimp.org/2.10/en/gimp-tool-eraser.html ( https://docs.gimp.org/2.10/nl/gimp-tool-eraser.html )

Sometimes a picture helps



The erase tool shows white because (1) the background colour is set to white (2) the layer has no transparency, an alpha channel. Add one with Layer -> Transparency -> Add Alpha channel

The erase then shows a checker pattern which is a way of denoting transparency.

If you add a new transparent layer on top Layer -> New Layer and make sure the Fill With is set to Transparency, then you can paint and erase without problem.

Thank you, I try.

---

(01-04-2023, 06:55 AM)denzjos Wrote: Does your drawing have multiple layers ?

No, only one.

[programmer_ceds]

(01-04-2023, 10:16 AM)adriaannelemans@online.nl Wrote:

(01-04-2023, 06:55 AM)denzjos Wrote: Does your drawing have multiple layers ?

No, only one.

In that case if your layer doesn't have an alpha channel erasing will show the background colour. If it has an alpha channel you will see the chequerboard pattern that indicates transparency (assuming in both cases that your are erasing at 100% opacity - if the opacity is less than this then the erasing effect will be less)

[denzjos]

@adriaannelemans@online.nl : I suggest you make a transparent layer on top of your background layer : to do this, click on a small white page icon with a '+' at the right bottom of the gimp screen. Now you can paint / erase on the new layer without changing the background layer. You can add more transparent layers if you want to use more colors to merge above each other. Some information : https://www.javatpoint.com/gimp-layers

[adriaannelemans@online.nl]

(01-04-2023, 08:53 AM)rich2005 Wrote:

Quote:Just started.  I have an image on wich I paint. When I erase it goes through the whole image and becomes white. How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

It is easy, New to Gimp ? Check with the Gimp documentation first https://docs.gimp.org/2.10/en/gimp-tool-eraser.html ( https://docs.gimp.org/2.10/nl/gimp-tool-eraser.html )

Sometimes a picture helps



The erase tool shows white because (1) the background colour is set to white (2) the layer has no transparency, an alpha channel. Add one with Layer -> Transparency -> Add Alpha channel

The erase then shows a checker pattern which is a way of denoting transparency.

If you add a new transparent layer on top Layer -> New Layer and make sure the Fill With is set to Transparency, then you can paint and erase without problem.

You helped me out with this one. Now how can I select a part and than work on that selection, change size, color, mirror or move it. I tried to make a new layer first but it didn't work.

[denzjos]

(01-18-2023, 05:59 AM)adriaannelemans@online.nl Wrote:

(01-04-2023, 08:53 AM)rich2005 Wrote:

Quote:Just started.  I have an image on wich I paint. When I erase it goes through the whole image and becomes white. How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

It is easy, New to Gimp ? Check with the Gimp documentation first https://docs.gimp.org/2.10/en/gimp-tool-eraser.html ( https://docs.gimp.org/2.10/nl/gimp-tool-eraser.html )

Sometimes a picture helps



The erase tool shows white because (1) the background colour is set to white (2) the layer has no transparency, an alpha channel. Add one with Layer -> Transparency -> Add Alpha channel

The erase then shows a checker pattern which is a way of denoting transparency.

If you add a new transparent layer on top Layer -> New Layer and make sure the Fill With is set to Transparency, then you can paint and erase without problem.

You helped me out with this one. Now how can I select a part and than work on that selection, change size, color, mirror or move it. I tried to make a new layer first but it didn't work.

@adriaannelemans, a good manual concerning gimp : https://docs.gimp.org/2.10/en/

[rich2005]

Going back to the original question(s)

Quote:Just started. I have an image on wich I paint. When I erase it goes through the whole image and becomes white. ...and only one layer

That was explained, the image is single layer, has no alpha channel (transparency) and the background (BG) colour is set to white.
The solution, use more than one layer, the bottom layer is the background, the top layer is where you paint and erase.

Quote:How should I erase something and keep my background intact ? I'm sure its easy, but I can't find.

This has nothing to do with the eraser tool, it depends on the image and very often it is not easy. Assuming a single layer and a photo/graphic. Various ways.

1. Use the clone tool or heal tool to paint out the part you want removed.
https://docs.gimp.org/2.10/en/gimp-tool-clone.html and https://docs.gimp.org/2.10/en/gimp-tool-heal.html
quick demo of clone tool: https://i.imgur.com/PV9O1Sn.mp4

2. Use a third-party plugin to recreate the missing pixels using the surrounding parts of the image.
Examples:
https://patdavid.net/2012/08/getting-aro...selection/ resynthesizer plugin
https://patdavid.net/2014/02/getting-aro...ware-fill/ gmic plugin