Intriguing challenge - great way to combine some of my hobbies into one thing (not NASCAR, necessarily, but cars, for sure!
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I decided to really customize the "Car of Tomorrow" - the Dodge Challenger isn't approved for the series (yet - I read rumors, though ... ) but since this is the future, I figure I'll give it a shot and see if the details can live on the existing bodywork; I had to move the grille down to get it vertical, but the slope of the nose just might let it work okay.
Once I had "Challenger," and being Star Trek we also have a space element, I decided to pay tribute to lost heroes and dedicate it to the Challenger 7 who lost their lives in 1986:

)I decided to really customize the "Car of Tomorrow" - the Dodge Challenger isn't approved for the series (yet - I read rumors, though ... ) but since this is the future, I figure I'll give it a shot and see if the details can live on the existing bodywork; I had to move the grille down to get it vertical, but the slope of the nose just might let it work okay.
Once I had "Challenger," and being Star Trek we also have a space element, I decided to pay tribute to lost heroes and dedicate it to the Challenger 7 who lost their lives in 1986:


. EDIT: Okay, I see now that the scale of the front and the top are a little different, and by duplicating the stripes on the hood to the nose, they went from being about 3/4 the width of the polygon to less than half ... - tough to check, though, because the viewer seems to use the previous body, not the COT - I can load the DirectX COT body, but it doesn't show the texture then ... d'oh! 
) has a much thinner C-pillar than the other cars. I kept the windows from the template, but figured they could use these printed films to overlay a thicker C-pillar image, since the Challenger has a pretty hefty one; the previewer doesn't seem to pick that up, sticking with a default map for those windows, it seems.