Are Bullet and Mantaflow independent physics engines?

Game Engine Game Engine Support and Discussion
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Are Bullet and Mantaflow independent physics engines? Or is Bullet responsible for some of Mantaflow’s physics?

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Hi nicola369,
the physics engines in blender are independent and don’t affect each other.
You can however use objects from a baked rigid body simulation as effectors (collision) for the fluid simulation. But the fluid simulation won’t have an effect on the rigid body simulation itself.