Making your own liveries in Rolling Line is more simple than you might think!
You only need basic image editing skills, and it can even be done using tools like MS paint, though using software with layers is much easier.

To make a new livery you need to choose which type of wagon you want to change, and make a texture for the wagon to use.

You can find a range of templates to help you in the steam folder for Rolling Line:
C:\Program Files (x86)\Steam\steamapps\common\Rolling Line\Modding

create a copy of the template you wish to use, and change the colors to suit your livery. You can also paste in logos and such. You can use the detailed templates to make more complex skins.

Once you are happy with your texture, make sure it is stored in the "custom liveries" folder:
'Rolling Line \ Modding \ custom liveries'

You can also download all the templates here[mega.nz]

Once your texture is ready, and in the correct folder, go to the "liveries" menu in-game.

From here you can browse your own liveries, add a new one or browse ones you've downloaded from the steam workshop.



Choose "add livery" to create a new livery.

From here you can set the name, wagon type and texture.
You can also spawn in the wagon using the texture you've chosen to test how it looks.

You also need to set the thumbnail for your livery (which is shown in-game).
Simply spawn in your wagon, and capture a thumbnail for it in the same way you set the thumbnail for a layout.

Once you have chosen the correct texture and set a thumbnail you can save your livery.

Each type of wagon requires the correct texture template!
Here are the current 5 different wagons that can be changed:



There are two choices when making a livery for the small steam engine, you can either use the 'Simple' or 'Advanced' version.
The simple version is perfect for just adding a logo/text to the side of the engine, but if you want full control over texturing the model you can use the advanced option.

Simple:


Or advanced:

Once you have created a new livery you can easily upload it to the steam workshop.

Just select the livery in the "liveries" menu, then choose "upload to steam workshop".
You will be asked to chose an icon to be used on the workshop. this process is exactly the same as that for uploading a layout.

After you have set a thumbnail simply click "upload".
You will then be notified if the upload was successful.

Remember that workshop items can take up to an hour to appear on the workshop!

To update an already uploaded workshop item, go to the "workshop" entry on the pause menu.
From here choose "update livery".

Next choose the workshop item you wish to update, then choose the livery you want to replace it with.

From here you will be asked to re-take a thumbnail of the new updated item.

Then simply click "upload"

It may take up to an hour for these changes to show up!