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Bullet Bullet Physics on Deformable Rigid Bodies

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When a body experiences a collision, there may be causing a bump or decal on the body itself, and the box shape or hull shape only affects the transformation, how do I make it affect the vertex buffer, because in soft bodies simulation, you could actually affect the vertex buffer, you can't with rigid bodies, if I cast a soft body on the rigid body with limited elasticity. ohhh. but real strange to me...
how do I make this happen?

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