I just recently watched a 4-hour longplay of ATV Quad Power Racing 2 on the Xbox. I wondered, how did they achieve the physics on the quad bikes? Because after analyzing moments in the video where the quad bike landed after a long jump, bicycled, or crashed It seems to me that the wheels are "physical" rather than simply raycasted/shapecasted. I have two hypothesis:
1. The quad is entirely kinematic. The physics acted upon it are simulated through the animation.
2. The quad has a different physics body for collisions and a different one for driving.
So, how could have they achieved such physics in the game?
The blocks you mine has different hardness and characteristics. The most common type is of a medium strength, and then you can find softer and harder ones while digging. Blocks that cannot be mined at all are distinctively different and also has a red marker around them if you aim at them.