Red ochre

Perhaps try re-scanning with a weight on top of the photo... a book or something and a blanket over the scanner lid? The real problem is the shadows caused by the uneven surface. Scanning normally flattens these.

To read about layers press the F1 key or the help icon to get to the Pdn documentation regarding layers... a simple and useful concept, nothing to be afraid of!
The best way to learn is to practice and experiment... as long as you don't overwrite your original file there is nothing to lose... and you still have the original (real) photo anyway.
So...

1. open the image
2. Duplicate the layer - press this icon at the bottom of the layers windows.
3. Uncheck the top layer (little box in the top R.H.S. of the layer in the layers window) so you can see what you are doing.
4. Make sure the lower layer is selected by clicking on it (makes it highlighted blue in the layers windows)
5. Click Effects/Blurs/Gaussian blur  and increase the radius control to about 25.
6. Click on the top layer and make it visible (that little R.H.S. box needs a tick) and selected.
7. Select the eraser tool and adjust the controls as per my screenshot. They're click and drag controls.
8. Erase along the crease lines - you can always undo if you get it wrong.
9. When happy save as a .Pdn file then flatten and save in the file type you wish. Do not overwrite your original file!
10. Look at what you have done... is ok?... NO!... do it again, but better!... I'm kidding but 'practice makes perfect' and you will become more confident by repeating the process.😉👍

... You did ask ... and I'm sure there are better but more complex methods.
 
Removing the crease lines is relatively easy but the changes in tone from the uneven scan is harder to disguise.
The missing bits at the bottom can also be filled but may take a lengthier explanation.

You can currently use the fact that Layers/Rotate and Zoom 'remembers' the last used settings.
 
So, say you have a head composed of:
layer 1 - face skin colour.
layer 2 - nose and mouth.
layer 3 - eyes and hair.
To move the whole head first use Rotate and Zoom on layer 1 to move the face to a new position.
Then move to layer 2 and again use Rotate and Zoom on the same settings. Repeat for layer 3.
 
Far from ideal but the moves will be the same for each layer, whereas using the move tool is less accurate...unless you start pixel counting for each move!
I too look forward to layer groups.
 

The default canvas size cannot be changed, unfortunately, but there is a 'work-around', by creating a read-only Pdn file template and then opening the program by opening the template (via a desktop shortcut).
There are instructions on how do that here.

@Marilynx Try TR's Paste Frame. If you look through that thread there are examples on page 2 of creating frames around a selection.

Use coloured cotton?😉

 

Hello @MmmmMMMmMM
The built-in line curve only has 4 control points, however the Shapemaker plugin here allows curves to be chained together and many other options too.
It can be a steep learning curve but is well documented.
My BeznCurve plugin is a simpler alternative with 6 control points. here

If you scroll down to my post on the 14th of September 2016 there is a screenshot of the settings for a simple loopy line.
Here
Hope that helps

This plugin may help too Text Distortion

Hello @Hakanai - welcome to the forum.
 
Codelab is the best place to get started and there are tutorials here.
More advanced Visual studio plugins are discussed in Plugin Developers Central.

Welcome to the forum @VojtaSkaroupka
 
You could try this with the reverse option checked - if I'm understanding correctly what you're trying to achieve.
 

Try using the subtract selection mode? (but remember to switch back afterwards).
https://www.getpaint.net/doc/latest/SelectionTools.html
 
If you need Bezier curves or splines then create an object with the line tool on a new layer and use this to make your selection, then move back to your image layer to delete the selection? The ShapeMaker plugin can also be used for this technique if more complex geometry is needed.

I think TR's paste frame will work for this.
 
Copy your chevron image to the clipboard then lasso a selection on your player image and run paste-frame.
 

Looks like the pixel grid ? - next to the ruler - directly beneath 'Effects' ? Try zooming out and seeing if it disappears, or just turn it off.
https://www.getpaint.net/doc/latest/Toolbar.html

@strangefancypants  You want to fit the green terrain over the white map?
 
Personally I would...
1. Install Gridwarp.
2. Copy the white map to the clipboard.
3. Change to the green terrain layer.
4. Right click and select 'from clipboard' as the background option.
5. Stretch the control points as best you can to cover the white map outline.
 
Good luck, I really can't see a better (simple) way to do this within Pdn - but interested to see other suggestions.

Hello @Hasan Tahsin welcome to the forum.
 
This is a viable work-around:
1. create a blank file 1920 by 1080 pixels and save it as a .pdn file. Close Paint.net.
2. right-click on the desktop and select new > shortcut.
3. Enter the location of the file you created at 1. and give the shortcut a relevant name.
4. To open paint.net just double click the shortcut.

I think @drheller1 is after ways to create the patterns created when sword steel is repeatedly folded.
https://en.wikipedia.org/wiki/Damascus_steel
 
I would start by running the built-in clouds effect, then try my Artistic/Contour effect (in my pack), then distort this pattern by stretching and or tiling it.
My Distort/Aardvark and @Pyrochild's Tools/Liquify could be useful.
 

Try this Object2color

I think what @dipstick is doing is selecting an area around the text and copy/pasting this into a new layer.
This is then an 'object' (opaque pixels on a transparent layer) that my object bevel effect can be applied to.
So in other words it is the background that appears bevelled and the text remains flat.
The same principle should work using Boltbait's or other bevel effects. Note lighting direction is important too.
We tend generally to interpret convex objects as being light at the top left hand side and assume them to be convex or incised if the top L.H.S. is dark.
 

I think what @dipstick is doing is selecting an area around the text and copy/pasting this into a new layer.
This is then an 'object' (opaque pixels on a transparent layer) that my object bevel effect can be applied to.
So in other words it is the background that appears bevelled and the text remains flat.
The same principle should work using Boltbait's or other bevel effects. Note lighting direction is important too.
We tend generally to interpret convex objects as being light at the top left hand side and assume them to be convex or incised if the top L.H.S. is dark.
 

I think what @dipstick is doing is selecting an area around the text and copy/pasting this into a new layer.
This is then an 'object' (opaque pixels on a transparent layer) that my object bevel effect can be applied to.
So in other words it is the background that appears bevelled and the text remains flat.
The same principle should work using Boltbait's or other bevel effects. Note lighting direction is important too.
We tend generally to interpret convex objects as being light at the top left hand side and assume them to be convex or incised if the top L.H.S. is dark.
 

Scintillate  Any use?