Car Physics Issues

[Randalf-gh]

Hi everyone,

I ran the same track in both MGame and WRC to compare the experience. Here’s a short video for reference:
Demo video

I noticed a few differences that really affect the gameplay in MGame. The car feels unusually light and lacks grip, especially during braking. Is there a way to tweak the settings to increase the car’s adhesion to the road?

Another issue is the steering radius - it seems much wider than expected, making tight hairpin turns almost impossible. Is this something that can be adjusted in the game’s configuration?

Any advice would be greatly appreciated! Fixing these two aspects would make the game so much more enjoyable.

Thanks in advance for your help!

[gre-42]

Hello, thank you for the investigation. I confirmed your observation quantitatively using DiRT Rally's telemetry module and these scripts. The ggV diagram below shows the longitudinal and transverse accelerations on tarmac in DiRT Rally, which are way above the 9.8m/s² assumed by MGame.

The Google AI told me it is OK to increase the friction coefficients to 1.5, resulting in accelerations of up to 14.7m/s², and to lower the center of mass of each vehicle so they do not fall over. I plan to create a new release tomorrow, containing these (and other) changes.

If you want to tune the parameters yourself, you can have a look at this commit: d571fc4.

I additionally changed the scaling of the x-axis of the friction model, these changes are however not in one single commit.