I really hope that you can make you're own Livery, it doesn't mind if you do not see it in the race or that other people can't see you're livery, but just for fun, because I do really like making liverys and I searched for: f1 livery maker on Google, but I didnt find anything and I searched for hours. If you can make you're own livery in IGP Manager just for fun I would really appreciate it :)
Live for Speed has a great 3D car livery viewer. I believe it is the CMX viewer on this page.
It requires advanced image editing knowledge to use though, as you must make the artwork in a program like Photoshop then apply it to the car. It is not a user-friendly livery builder like iGP. You will need to get a skin template also from this forum to work from: https://www.lfs.net/forum/69-Skin-help-tools-templates
There is more help and information available in that forum.
Surely it's easier to just subscribe? £2.99 (app 4 euro) for a month and you've got your livery done.
Or it's only £19.99 (27Euro) for a year and you get all the 2D too :)
2D is totally worth it. In fact, I have two accounts. one free and one paid 2D. When I race in the free account I use my 2D account to spectate it because it's painful without, so I have two windows open, one to watch and one to make changes if I have to.
