diff --git a/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp b/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
index 2c745500..6c9b212a 100644
--- a/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
+++ b/Code/GamePhysics/Implementation/PhysicsAPI_Impl.cpp
@@ -169,7 +169,7 @@ UniquePointer<ICustomBody> API_Impl::CreateRigidBody( const API::SimpleBodyDescr
 
 UniquePointer<ICustomBody> API_Impl::CreateRigidBody( const API::SphericalBodyDescription &desc ) const
 {
-	return new SphericalRigidBody();
+	return new SphericalRigidBody( desc );
 }
 
 namespace Oyster { namespace Physics { namespace Default
diff --git a/Code/GamePhysics/Implementation/SimpleRigidBody.cpp b/Code/GamePhysics/Implementation/SimpleRigidBody.cpp
index d83aa399..40a1b7ee 100644
--- a/Code/GamePhysics/Implementation/SimpleRigidBody.cpp
+++ b/Code/GamePhysics/Implementation/SimpleRigidBody.cpp
@@ -10,7 +10,7 @@ using namespace ::Utility::Value;
 
 SimpleRigidBody::SimpleRigidBody()
 {
-	this->rigid = RigidBody();
+	this->rigid = RigidBody( Box(Float4x4::identity, Float3::null, Float3(1.0f)), 16.0f, Float4x4::identity );
 	this->gravityNormal = Float3::null;
 	this->collisionAction = Default::EventAction_Collision;
 	this->ignoreGravity = false;
diff --git a/Code/GamePhysics/Implementation/SphericalRigidBody.cpp b/Code/GamePhysics/Implementation/SphericalRigidBody.cpp
index 1c9b7b52..baf8d98b 100644
--- a/Code/GamePhysics/Implementation/SphericalRigidBody.cpp
+++ b/Code/GamePhysics/Implementation/SphericalRigidBody.cpp
@@ -9,11 +9,33 @@ using namespace ::Utility::DynamicMemory;
 using namespace ::Utility::Value;
 
 SphericalRigidBody::SphericalRigidBody()
-	: previous(), current( Box(Float4x4::identity, Float3::null, Float3(1.0f)) ),
-	  gravityNormal( 0.0f ),
-	  collisionAction(Default::EventAction_Collision),
-	  ignoreGravity( false ),
-	  body( Float3::null, 0.5f ) {}
+{
+	this->rigid = RigidBody( Box(Float4x4::identity, Float3::null, Float3(1.0f)), 10.0f, Float4x4::identity );
+	this->gravityNormal = Float3::null;
+	this->collisionAction = Default::EventAction_Collision;
+	this->ignoreGravity = false;
+	this->body = Sphere( Float3::null, 0.5f );
+}
+
+SphericalRigidBody::SphericalRigidBody( const API::SphericalBodyDescription &desc )
+{
+	this->rigid = RigidBody( Box( desc.rotation, desc.centerPosition, Float3(2.0f * desc.radius) ),
+							 desc.mass,
+							 desc.inertiaTensor );
+	this->gravityNormal = Float3::null;
+
+	if( desc.subscription )
+	{
+		this->collisionAction = desc.subscription;
+	}
+	else
+	{
+		this->collisionAction = Default::EventAction_Collision;
+	}
+
+	this->ignoreGravity = desc.ignoreGravity;
+	this->body = Sphere( desc.centerPosition, desc.radius );
+}
 
 SphericalRigidBody::~SphericalRigidBody() {}
 
@@ -43,7 +65,7 @@ bool SphericalRigidBody::Intersects( const ICustomBody &object, Float timeStepLe
 
 bool SphericalRigidBody::Intersects( const ICollideable &shape ) const
 {
-	return this->current.box.Intersects( shape );
+	return this->rigid.box.Intersects( shape );
 }
 
 Sphere & SphericalRigidBody::GetBoundingSphere( Sphere &targetMem ) const
@@ -54,7 +76,7 @@ Sphere & SphericalRigidBody::GetBoundingSphere( Sphere &targetMem ) const
 Float3 & SphericalRigidBody::GetNormalAt( const Float3 &worldPos, Float3 &targetMem ) const
 {
 	//! @todo TODO: better implementation needed
-	return targetMem = (worldPos - this->current.box.center).GetNormalized();
+	return targetMem = (worldPos - this->rigid.box.center).GetNormalized();
 }
 
 Float3 & SphericalRigidBody::GetGravityNormal( Float3 &targetMem ) const
@@ -64,33 +86,32 @@ Float3 & SphericalRigidBody::GetGravityNormal( Float3 &targetMem ) const
 
 Float3 & SphericalRigidBody::GetCenter( Float3 &targetMem ) const
 {
-	return targetMem = this->current.box.center;
+	return targetMem = this->rigid.box.center;
 }
 
 Float4x4 & SphericalRigidBody::GetRotation( Float4x4 &targetMem ) const
 {
-	return targetMem = this->current.box.rotation;
+	return targetMem = this->rigid.box.rotation;
 }
 
 Float4x4 & SphericalRigidBody::GetOrientation( Float4x4 &targetMem ) const
 {
-	return targetMem = this->current.GetOrientation();
+	return targetMem = this->rigid.GetOrientation();
 }
 
 Float4x4 & SphericalRigidBody::GetView( Float4x4 &targetMem ) const
 {
-	return targetMem = this->current.GetView();
+	return targetMem = this->rigid.GetView();
 }
 
 UpdateState SphericalRigidBody::Update( Float timeStepLength )
 {
-	this->previous = this->current; // memorizing the old state
-
-	this->current.Update_LeapFrog( timeStepLength );
-	this->body.center = this->current.GetCenter();
+	this->rigid.Update_LeapFrog( timeStepLength );
+	this->body.center = this->rigid.GetCenter();
 
 	// compare previous and new state and return result
-	return this->current == this->previous ? UpdateState_resting : UpdateState_altered;
+	//return this->current == this->previous ? UpdateState_resting : UpdateState_altered;
+	return UpdateState_altered;
 }
 
 void SphericalRigidBody::SetSubscription( ICustomBody::EventAction_Collision functionPointer )
@@ -118,43 +139,43 @@ void SphericalRigidBody::SetGravityNormal( const Float3 &normalizedVector )
 
 void SphericalRigidBody::SetMomentOfInertiaTensor_KeepVelocity( const Float4x4 &localI )
 {
-	this->current.SetMomentOfInertia_KeepVelocity( localI );
+	this->rigid.SetMomentOfInertia_KeepVelocity( localI );
 }
 
 void SphericalRigidBody::SetMomentOfInertiaTensor_KeepMomentum( const Float4x4 &localI )
 {
-	this->current.SetMomentOfInertia_KeepMomentum( localI );
+	this->rigid.SetMomentOfInertia_KeepMomentum( localI );
 }
 
 void SphericalRigidBody::SetMass_KeepVelocity( Float m )
 {
-	this->current.SetMass_KeepVelocity( m );
+	this->rigid.SetMass_KeepVelocity( m );
 }
 
 void SphericalRigidBody::SetMass_KeepMomentum( Float m )
 {
-	this->current.SetMass_KeepMomentum( m );
+	this->rigid.SetMass_KeepMomentum( m );
 }
 
 void SphericalRigidBody::SetCenter( const Float3 &worldPos )
 {
-	this->current.SetCenter( worldPos );
+	this->rigid.SetCenter( worldPos );
 	this->body.center = worldPos;
 }
 
 void SphericalRigidBody::SetRotation( const Float4x4 &rotation )
 {
-	this->current.SetRotation( rotation );
+	this->rigid.SetRotation( rotation );
 }
 
 void SphericalRigidBody::SetOrientation( const Float4x4 &orientation )
 {
-	this->current.SetOrientation( orientation );
+	this->rigid.SetOrientation( orientation );
 	this->body.center = orientation.v[3].xyz;
 }
 
 void SphericalRigidBody::SetSize( const Float3 &size )
 {
-	this->current.SetSize( size );
+	this->rigid.SetSize( size );
 	this->body.radius = 0.5f * Min( Min( size.x, size.y ), size.z ); // inline Min( FloatN )?
 }
\ No newline at end of file
diff --git a/Code/GamePhysics/Implementation/SphericalRigidBody.h b/Code/GamePhysics/Implementation/SphericalRigidBody.h
index 1540f7a1..61f5d604 100644
--- a/Code/GamePhysics/Implementation/SphericalRigidBody.h
+++ b/Code/GamePhysics/Implementation/SphericalRigidBody.h
@@ -11,6 +11,7 @@ namespace Oyster { namespace Physics
 	{
 	public:
 		SphericalRigidBody();
+		SphericalRigidBody( const API::SphericalBodyDescription &desc );
 		virtual ~SphericalRigidBody();
 
 		::Utility::DynamicMemory::UniquePointer<ICustomBody> Clone() const;
@@ -43,7 +44,7 @@ namespace Oyster { namespace Physics
 		void SetSize( const ::Oyster::Math::Float3 &size );
 
 	private:
-		::Oyster::Physics3D::RigidBody previous, current;
+		::Oyster::Physics3D::RigidBody rigid;
 		::Oyster::Math::Float3 gravityNormal;
 		EventAction_Collision collisionAction;
 		bool ignoreGravity;