Physics Step

To control Unity Physics settings, you need a Physics Step authoring component. As usual when working with Entities, a SubScene is necessary when adding the Physics Step authoring component. Only one instance of this component should be present in a scene as it will apply to the whole physics simulation.

Field	Description
Simulation Type	Select between Unity Physics, Havok Physics or None. You can only access the Havok Physics features if you have installed the Havok Physics package and you have a license. If not, Unity Physics is the default physics engine.
Gravity	Set the world gravity. You can also use the Gravity Factor scalar to set this value, as either a positive or negative float value. The default is 1 (that is, 1 multiplied by WorldGravity).
Solver Iteration Count	Specify the number of solver iterations the physics system performs. Higher values mean more stability, but worse performance.
Multi Threaded	Toggle multi-threading. If enabled, the physics system uses a large number of threads and jobs for simulation. If disabled, the physics system uses a very small number of single threaded jobs.
Synchronize Collision World	Specify whether to update the collision world after the step for more precise queries.
Enable Contact Solver Stabilization Heuristic	Enabling Contact Solver Stabilization Heuristic results in better object-stacking stability. However, it requires more computational resources when simulating.

Physics Step component.