File name prefixes
Each car in LFS has a unique file name prefix at the beginning of the file name. For example, the FZ50 GTR carries the prefix FZR_ at the front of the file name. So we have FZR_mygreatskin.jpg

We (and the devs) recommend using upper case (capital) letters and the underscore ( _ ) in your prefix. This helps you to identify skin files easily by name, at a glance. It is also the way the default skin files are named in LFS.

File format
All skins files are JPG files. You must make sure that your skin is JPG format and not a BMP or PNG or GIF etc. While online LFS looks out for jpg files with a skin file name prefix. So any deviation from the normal naming convention means your skin will not be seen by others. LFS Skins are JPG files.

File name length
File name length. Make sure your filename is not too long. Including the prefix, the filename should be no more than 15 characters long. This does not include the .jpg extension on the end.

Naming
When naming your file it is wise to choose a unique name that is unlikely to exist already for someone else's skin.
Putting your intitials in the filename and/or a number can help to keep your skin names unique. For example, John Smith might name his skin FZR_JS01porsche. This is better than just naming it FZR_porsche, chances are that fifty other people will also try to name their skin FZR_porsche, it is an obvious name but not unique. John's second FZR might be named FZR_JS02porsche, you can see how this method has its advantages, it's easy for you to spot your skin's filename in a crowd.
It is also a good idea not to use special characters in your filenames. Characters like *, &, $, <, @ etc should be avoided.

Which Folder Do I Save My Skins To?
There are two skin folders in your main LFS Folder, one is simply called skins and the other is called skins_x.

The skins folder is where you should put any skins that YOU will use on YOUR car.

The skins_x folder is where you should put OTHER PEOPLE'S skins. You will still see them online when your mates use them but the extra skins won't be cluttering up your skins menu or making your personal skins hard to find.

Licensed racers can choose to download other racer's skins automatically from LFS World when racing online, these all automatically go to the skins_x folder. Licensed racers get the benefit of uploading and storing 30 skins online at LFS World for other licensed racers to download in-game online!
Enable or disable automatic skin downloads from your options menu in LFS.