[White stripes on the cut edges of the cut out areas in the image.]

On 11/3/2020 at 7:27 PM, MJW said:

After all, all he had to do is run Transparent to Transparent Black before saving an image, but that's somehow prohibitively difficult.

When you have ~1500 files to edit, a few extra clicks can make a huge difference.

[White stripes on the cut edges of the cut out areas in the image.]

29 minutes ago, MJW said:

Bye.

I have no idea why you are being rude to me, but I want to say a big thank you to Andrew David and Rick Brewster ...

[White stripes on the cut edges of the cut out areas in the image.]

I just wanted to draw your attention to a problem that I noticed while using paint.net. I don't have this problem with the GIMP, or any other photo editing program I use... 😑

 

It could even be reproduced. But apparently that's how it should be. It's a shame because I can no longer use paint.net for that reason alone. I don't want to manually set the transparent color to black every time so as not to get the white edges. Unfortunately I have to edit the textures with GIMP...

 

Thank you for the information and support.

[White stripes on the cut edges of the cut out areas in the image.]

6 hours ago, MJW said:

Seems like that's clearly a problem with the Photo Viewer, not PDN. Wonder what causes  it.

 

I don't think the Photo Viewer is the problem as these edges are also visible in games that use these edited textures.

Quake III Arena - Screenshot:
 

 

[White stripes on the cut edges of the cut out areas in the image.]

On 10/30/2020 at 5:00 PM, Rick Brewster said:

The only difference I'm seeing between the PNGs saved with GIMP vs PDN is that GIMP filled the area with transparent black (#00000000) whereas PDN filled it with transparent white (#00FFFFFF). They're equivalent, but for some reason Photos is showing a white border.

 

On 10/30/2020 at 5:00 PM, Rick Brewster said:

I may also change PDN to fill with transparent black, although that might cause problems with other people's workflows ...

 

I think that might solve the problem.

 

On 11/1/2020 at 11:09 PM, ZerTerO said:

Wouldn't it be an option if the user could choose the transparent color in the settings?

 

And that would be the option that could work too.

[White stripes on the cut edges of the cut out areas in the image.]

28 minutes ago, MJW said:

Perhaps there's something specific about your computer's version of Windows, or other programs installed on your computer, that causes it to save PNG files differently than on most other people's computers.

I have a new Windows 10 installation and no additional software on the PC. I reinstalled the computer especially for this to test this statement.

[White stripes on the cut edges of the cut out areas in the image.]

9 hours ago, MJW said:

However, if you do get transparent white, the question is why? As was recently discussed on this forum, all transparent pixels are converted to transparent black when images are saved in PNG files. I know almost nothing about this, but if your files contain transparent white, I wonder if somehow a different routine, in a different DLL, is being used to save PNG files.

Hello. I uninstalled paint.net and deleted the following directories:

 

%LocalAppData%\paint.net

%ProgramFiles%\paint.net

 

I then reinstalled paint.net and did exactly the same with the picture as described here. I get the white borders and the information is saved as transparent white in the PNG file. So there are no plugins installed and I also have these white borders when I save the picture as TGA (which Quake III Arena needs).

 

 

 

I have an unchanged Windows 10 installation and I was able to reproduce this problem on 2 different notebooks and on 2 other PCs. I don't think it's because of my Windows and program installation. The information is saved as transparent white by default...

 

The result is far worse when I use the Lasso Select (Shortcut S, S) tool.

 

We can also make an appointment and I'll demonstrate via TeamViewer. 😄

 

[White stripes on the cut edges of the cut out areas in the image.]

On 10/30/2020 at 5:00 PM, Rick Brewster said:

You should be able to work around this by filling the area with transparent black. You can do that by setting the primary color to transparent black (choose black, then set Alpha/Opacity to zero) and using Edit -> Fill Selection (backspace).

That worked!!! Apparently that was the problem. It might actually be necessary to change the color to transparent black. 😬

 

Thank you for the help and for your patience. I can still create a video of my process while editing the image file, but it's actually simple: Open the image, mark the area, delete the area, save the image as a PNG (all with standard settings).

 

Wouldn't it be an option if the user could choose the transparent color in the settings?

 

Many thanks again! 😁👍

[White stripes on the cut edges of the cut out areas in the image.]

On 10/30/2020 at 5:00 PM, Rick Brewster said:

The only difference I'm seeing between the PNGs saved with GIMP vs PDN is that GIMP filled the area with transparent black (#00000000) whereas PDN filled it with transparent white (#00FFFFFF). They're equivalent, but for some reason Photos is showing a white border.

I think that's exactly the problem. I don't know why, but the transparent white areas cause a white border on certain image renderers. Why does PDN use white areas? GIMP, Serif Affinity Photo, and Corel PaintShop Pro (i've tested these programs) don't do this.

[White stripes on the cut edges of the cut out areas in the image.]

Quote

At step 4 please try using AA's Assistant (you may need to use it twice) before saving at .png and see if it makes any difference.

 

I don't want to use AA's Assistant. As I said, in my opinion this is a bug in Paint.Net. I have no such problems with the GIMP. Even with the standard settings.
 

Also included a download so everyone can check the pictures: https://workupload.com/file/n4nucWrmpYS

Would be nice if we could find a solution without any external plugins... 😉

[White stripes on the cut edges of the cut out areas in the image.]

Here are the settings:

 

[White stripes on the cut edges of the cut out areas in the image.]

22 minutes ago, Pixey said:

Another way:

 

1.  After you delete the area go to the image where you deleted it from and use the color picker to get the same black color.

2.  Make a new layer and move it below the image & add the black color.

3. Flatten.

The cut out area should remain transparent...

[White stripes on the cut edges of the cut out areas in the image.]

No, I am and was not offended, just had very little time. Here is my approach. I demonstrate by using an image from the getpaint.net website:

 

1. Open Image and select an area with S (Shortkey)

 

2. Highlight the area to be removed

3. Remove area with DEL / ENTF (in Germany)

4. This is how it looks in the end

5. Save image...

6. ...as PNG-file

7. And now open the picture with Windows Photos and the white borders are visible.

8. Zoomed in...

 

As already written, these edges are also visible in the game. Interestingly, they are not visible with IrfanView or XnView. Only with Windows Photos and in the game (Quake III Arena).

 

Thank you for the help and look forward to your answer. You can test yourself with any picture at any time. With the GIMP, these borders do not appear. "Antialiased / Pixelated selection quality" does not change anything.

 

Download: Output files from Paint.Net and GIMP

 

Best regards

ZerTerO

[White stripes on the cut edges of the cut out areas in the image.]

 I'm not clear on what you mean. What were the operations you used to cut the edges?

>> Select area with S and delete with DEL

 

 

Was the image originally PNG, or was it some other format? Was it saved directly as a PNG (with the white edges), or was it saved in some other format, then reloaded and combined to form the image saved as a PNG?

>> I tested it with the original TGA format (from Quake III Arena) and a PNG version (from Quake Live). The edited image was saved directly as a PNG. Always with the same result. With GIMP, I don't have these white cut edges. Regardless of the file format.

 

Finally, what is a "restrained area"? I'm not familiar with that term.

>> I have now corrected the topic title.

[White stripes on the cut edges of the cut out areas in the image.]

Hello dear forum members,

 

when I cut out an area in an image with an alpha channel, Paint.Net gives me white streaks on the cut edges. Gimp doesn't have these cut edges. These edges can also be seen in the representation in the game. In Windows 10 "Photos" you can see these edges in a direct comparison. The image is a texture from the game Quake 3 Arena.

 

I added a PNG file as an attachment. On the left the file was edited with Paint.Net and on the right with GIMP. Does anyone have any idea how I can avoid these white edges?

 

Best regards

ZerTerO