In Trackmania Nations Forever on Windows, when I only press the up arrow, my car starts drifting to the left after after it hits the beginning of a slope. Why?


  • Does it happen the exact same way every single time? To me it just seemed like you hit the slope at a fast speed and the physics engine took care of the rest. – Elise Sep 26 '14 at 23:39
  • @Chippies Exact same way every single time. I wonder why physics engine reacts that way. – Franck Dernoncourt Sep 26 '14 at 23:41
  • Maybe the track/vehicle isn't perfectly symmetrical, that's all I can think of... – Elise Sep 27 '14 at 0:02
  • As far as I know, that happens to everyone. It's a bug in the physics engine. – MBraedley Sep 27 '14 at 12:42

As has been covered in the comments, this appears to be a unique quirk of the Trackmania physics engine.

My theory is that when evaluating each frame for collisions, the four wheels of the car are not all considered at the same time, so the jolt received when hitting the sloped booster is registered a fraction of a second earlier on the front left wheel compared to the front right, resulting in a slight difference in imparted acceleration from the impact - which has the end result of the car veering slightly to the left after the impact.

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