U can read jburon72 tutorial here:
https://whenboredomestrike.wordpress.com/2018/09/15/tutorial-how-to-use-my-3d-models-with-photoshop/
Or look for Krisdix on youtube theres a few tutorial:
https://www.youtube.com/channel/UCrLdMMydBf7LTvnFcyZ_lbQ
In those tutorials you will see them make the alpha channel in white you dont need to do this part for the FOM_Car. but you need to make the paint_s.tif wich will make the texture on the car matte or shiny or chrome.
I use photoshop but I believe you can do it with paint.net or Gimp.
You need Ego Arp Archiver lastest version here: (
https://ryder25.itch.io/ego-erp-archiver)
Intel DDS plugins for photoshop here:
(
https://software.intel.com/content/www/us/en/develop/articles/intel-texture-works-plugin.html )
Nvidia DDS plugins for save as DXT1 format here:
(
https://www.softpedia.com/get/Multi...VIDIA-Texture-Tools-for-Adobe-Photoshop.shtml )
When you finish to add your sponsors on the psd file, with the Intel DDs plugins you save like this with those settings:
View attachment 389516
Then you need to make the paint_s.tif for car texture. Green for matte, red for shiny and purple or pink for chrome I believe. When it's done you save with the nvidia DDS plugins with those settings:
View attachment 389518
After with Ego arp archiver you go there:
Program Files (x86)\Steam\steamapps\common\F1 2020\2020_asset_groups\f1_2020_vehicle_package\teams\fom_car\wep\fom_car.erp
And open fom_car.erp.
In the fom_car.erp replace the livery-racenet_01_d.tif and livery-racenet_01_s.tif with yours.
View attachment 389529View attachment 389528
You also need to replace the same textures for myteam_engine name here:
Program Files (x86)\Steam\steamapps\common\F1 2020\2020_asset_groups\f1_2020_vehicle_package\teams\myteam_ (your engine name) and replace livery-racenet_01_d.tif and livery-racenet_01_s.tif with yours again.
I know its a lot at first but I can help if you still dont understand everything.