First things first, do not make it too complex, the more there is the heavier things will be on the CPU.

Secondly, I am not sure how much I will extend this feature as the process as explained below ( starting with a b/w bitmap and creating an outline based on that ) is pretty straight forward and easy to get nice consistent results results.

Third, let me know if you have any questions :)

To access svg import you first have to enable "drawing" in the wallpaper settings. This will enable an on-screen menu. Once enable just hold your mouse down for 1 second on the wallpaper and a menu should appear, showing the import option.

The "Limited" part indicated the fact I only import paths from SVG, and have no support for circles, text, rectangle shapes, clippaths or more advanced SVG features. But dont worry, you can convert all those items to a path with a single menu option :)

Hold mouse button down until menu appears and select import. Select your svg. Again, do not do something insanely crazy :)

You can easily draw with paths in Inkscape ( https://inkscape.org/ ), which will be the tool I will be using for everything in this topic.

If you want to use the text option, circle or other more 'advanced' svg elements, be sure to use the Menu -> Path -> Object To Path option to convert everything before saving for use in the wallpaper as they need to be paths. This is due to lack of support on my side. Also don't forget to keep a copy of your working version :)

First off, some svg stacks shapes on top of shapes, where the top most shape hides sections of the shape below it. The hidden parts will become visible when importing. So thats problem nr1.

When using someone else svg you might see lines going from one point to another that was not visible in inkscape. To fix that, when in inkscake, it often works to use "Path -> Break Apart" on that object.

You might also see items incorrectly positions. This is ( i believe ) due to object grouping ( I will try to get support for this but I wont proritize it ). In Inkscape you can ungroup it by selecting the object and using "Object -> Ungroup"


For this we will need:
- Inkscape ( https://inkscape.org/ )
- A nice black and white image ( no grays ), with a simple but nice shape to trace. I have provided one in the wallpaper ( %steam%\steamapps\workshop\content\431960\850923796\svg-examples ) called rawr.png

If you have a nice comic style graphic with a black outline but is colored in ( or using grays ) look below this section on how to convert it to good black/white image with Gimp.

Importing the bitmap

• Open Inkscape
  
• Menu -> File -> Import
  
• Select the black and white image ( for example rarw.png )
  
• On the "bitmap image import" screen that pops up click OK

Image imported, lets create a vector graphic version of the bitmap.

• Select the image if it was not automatically selected
  
• Menu -> Path -> Trace Bitmap
  
• In the "trace bitmap" dialog. Set 'Colors' to 2
  
• In the "trace bitmap" dialog. Be sure 'stack scans' is checked.
  
• Click OK. It will create the outline ( althought it might look like it didnt ) but not close the dialog, so close the dialog after you pressed OK

Now to get rid of the bitmap

• Select the created shape ( its on top of the original bitmap ) and move it and remove the original image.

Now we only have the vector graphic left. One last thing and we can try to import it

• Select the image
  
• Menu -> Path -> Break Apart ( this will turn everything black but thats fine as we dont care about colors )
  
• Menu-> File -> Save

Additionally:

• With everything still selected, go to color options ( ctrl + shift + f ) and disable fill, and enable stroke. this will make it look nice in the svg too :)
  
• Save if you need to.

If you have a comic style image, with thick black outlines and just want to convert all all other colors to white. This can easily be done with gimp ( or photoshop if you are rich )

For Gimp:

• Load the image up
  
• Desaturate the image. In gimp its Menu -> Color -> Desaturate
  
• Adjust the color value/brightness curve. In gimp I use Menu -> Color -> Curve and adjust the curve until everything is white except that black outline.
  
• Save

For photoshop:
Using the Threshold adjustment found in the adjustments layers or Image -> Adjustments -> Threshold is perfect for making pretty much any image into complete black and white (no greys at all).

This is a search for black & white decals on google.
https://www.google.com/search?q=decals&tbm=isch&tbs=ic:gray