Most importantly, what makes GTA Cars so.... special?
A lot... Okay, almost EVERY modded car I've seen in GTA, you can see very visible, pixelated polygons poking out from edges... that aren't smoothed at all.
Compare this to Rockstar-made, vanilla vehicles which 99% of the time are smoothed out and you never notice vertices or polygons poking out and looking jagged at any angles...compared to many modded vehicles out there. It's easily discernible to tell a mod car from a vanilla GTA vehicle.
Comparison images for show:
What's the magic behind it? What does Rockstar's modelling team do that makes the cars in their games appear SO smoothed and streamlined, without any jagged verts showing up?
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Born to snipe