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Tested with my i5-4670K stock 3.4-3.8GHz and GTX 780 Staying absolutely still, except for the driving test Empty grid, no postfx, settings max...
You can edit the cars to make it possible to break beams so you can cut cars in half and stuff (i did that some time ago). But it won't look that...
You could have it so that players' cars don't collide with eachother for the first version of multiplayer. All other cars are simulated on...
One of the devs already said the tech demo will never be updated.