In a custom championship or in a single race we have the possibility to create multi class races . Let’s say as example lmp2 and Gt3 gen2 , let’s say 10 cars per class How I can ensure that at least in gt3 class which have 8 cars and liveries more than 40 will take part at least one car per brand ? Is any way to customise that? thanks in advance
You can customize that will AI files for the classes you use. Put the amount of liveries the AI should use into the GT3G2.xml und LMP2.xml and set the amount of opponents ingame to match the AI number in the files (like 10 AIs in each file, set custom grid to 10 GT3G2s and 10 LMP2s. Have in mind if you use one of defined AI liveries you have to subtract one from the AI opponent number ingame. You can find more informations how to set up custom AI files here
So only through creating .xml custom grid otherwise the game will choose randomly and could get 5 Audis?
Yes, otherwise the game will choose random AI opponents out of every car and livery of that class, so you could end up with one car filling most slots and other not being in at all