Real-Time Physics Simulation Forum

Where it states in the Bullet Physics Manual,

The minimum object size for moving objects is about 0.1 units. When using default gravity of 9.8, those units are in meters so don’t create objects smaller then 10 centimeter. It is recommended to keep the maximum size of moving objects smaller then about 5 units/meters.

Would that be a relational size to something like Maya? So if I was building a 1.8 metre high person... he would be 1.8 Units in Maya, to utilize the standard -9.8 gravity defaults?

Maya always working internally in centimeters, so if you create a 180 centimeters person, Bullet interprets this value as 180 meters.

If you set the working units of Maya in meters (window/preferences/settings) neither it works, because the values passed to Bullet is converted to centimeters internally,so it's recommended to use centimeters as meters and create a person of 1,8 centimeters,that for Bullet is 1,8 meters and the gravity and impulses acts correctly.