With his help, I am finally getting the 2D profile icons to look right, and so I am beginning to update the already-released cars, and for cars that I release from here on out I'll be sure to include the profiles for the train list.
I've added another car that can be downloaded - the Fruit (Produce) Reefer. This is a new car distinct from the default Reefers in the game, solely for Produce. Later on, I'll get around to releasing the mod skin for the regular reefers. And, I have updated the Goods Boxcar to include its 2D profiles; if you've already got this car, you may want to grab it again to add those files in. You do need to replace the files you've already downloaded in order for this to work right!
In the course of all this, Bombardiere also pointed out that it is possible to add more versions of the cars as they evolve over time... in other words, we're not limited to A-B-C-D eras with transitions every 50 years. The dates of transitions can be whatever we wish to assign, and you can have E-era and beyond if you want! Of course, we still only have so many 3DP models to use, but I can easily see taking the C-era boxcar and continuing to use it up until 1965, at which point in time it simply loses its running boards (via the alpha channel), and then the high-cube boxcar (D-era default) doesn't come into play until say 1980! This opens up whole new realms of potential, so I guess I have to say...
Curse you Bombardiere!
How will I ever have time to explore all of this vast potential? Oh, that and eat and sleep and earn a living?