Having an offline multiclass race can be great fun and useful for practicing your over taking and defending skills within a grid of differently paced machines.
Many new players of rFactor 2 may find it difficult to set up a multi-class race, choosing exactly the right number of A.I. cars in a certain class, exact skins and so on.
Using the add A.I. button will choose any car at random out of the opponents you have selected, allowing you no control over which cars and how many of them are chosen.
Find above a short video showing you how to choose the exact cars you want to race against from within the game, using the current UI quickly, and easily!