I've not posted any progress in a while, so here's something I've been working on for a bit - an overhaul of the Vipers in GT2, because the more I looked at them, the more they seemed off.
In GT1, the Vipers were 1997 spec, whereas for GT2 they were switched to 1999 spec to remain current. Unfortunately, this change happened very late in development, and so there are a ton of details that aren't quite right.
For 1999 the Viper had new 18" wheels with thick flat spokes, which Polyphony added to the car, but without changing the tyre sizes from 17" to 18". The foglight covers and the black seal around them were also scrapped, but remained on GT2's models. While they did update the paint colours to reflect the range available in 1999 (removing the 1997 blue colour, to everyone's disappointment), for some reason the silver colour was missed out from the RT/10. The stripes on the GTS were also a cost option, and in retrospect it turned out that they were a rare choice - apparently as few as 22 of the GTS in silver with blue stripes were sold that year as anyone paying for the stripes just upgraded to the then-new Viper ACR instead.
As a result, I've retouched all of these points to get them right for the 1999 Viper. No foglight covers, 18" wheels, the full colour lineup, and the option to have your GTS without stripes.
Once all of these things were corrected, the blue paint looked very wrong on the 1999 model, with every detail now sticking out. Almost exactly six years after adding it to the Viper (and that then snowballing into a mod with thousands of edits) I removed it again.
...Of course, I wasn't just going to get rid of the best paintjob. Since the Vipers in GT2 already had a lot of 1997 details, I also went the other way with them and removed all of the 1999 changes, and split them off into independent cars.
Both models have the 1997 colours from GT1, plus the thin-spoked 17" wheels and foglight covers. The 1997 RT/10 also hadn't gained the bonnet vents from the GTS yet, so I've removed them for that model. Performance is the same as the '99 and so are the two RMs, but I'll be adjusting the prices slightly to reflect that they're older models.
I also had to paint out the foglight covers in the dealership render for both 1999 cars, and because the RT/10 was rendered when it was still modelled as a 1997 car, I had to paint on the new wheels and bonnet vents. The GTS model has had a little fix ported over from GT1+ too - for 1996 only, the stripes were unbroken around the whole car, but for 1997 onwards they stop at the top of the rear numberplate recess and only start again at the bumper. Easy enough to paint them out in that gap, and fix the one last weirdness with the car.