diff --git a/extern/bullet/Bullet/NarrowPhaseCollision/SubSimplexConvexCast.cpp b/extern/bullet/Bullet/NarrowPhaseCollision/SubSimplexConvexCast.cpp
index a71272552da..019b4c3bfcb 100644
--- a/extern/bullet/Bullet/NarrowPhaseCollision/SubSimplexConvexCast.cpp
+++ b/extern/bullet/Bullet/NarrowPhaseCollision/SubSimplexConvexCast.cpp
@@ -54,8 +54,11 @@ bool	SubsimplexConvexCast::calcTimeOfImpact(
 	//float radius = 0.01f;
 
 	SimdScalar lambda = 0.f;
-	SimdVector3 s = rayFromLocalA.getOrigin();
-	SimdVector3 r = rayToLocalA.getOrigin()-rayFromLocalA.getOrigin();
+	//todo: need to verify this:
+	//because of minkowski difference, we need the inverse direction
+	
+	SimdVector3 s = -rayFromLocalA.getOrigin();
+	SimdVector3 r = -(rayToLocalA.getOrigin()-rayFromLocalA.getOrigin());
 	SimdVector3 x = s;
 	SimdVector3 v;
 	SimdVector3 arbitraryPoint = convex->LocalGetSupportingVertex(r);
@@ -120,7 +123,7 @@ bool	SubsimplexConvexCast::calcTimeOfImpact(
 	//int numiter = MAX_ITERATIONS - maxIter;
 //	printf("number of iterations: %d", numiter);
 	result.m_fraction = lambda;
-	result.m_normal = -n;
+	result.m_normal = n;
 
 	return true;
 }
diff --git a/extern/bullet/Extras/PhysicsInterface/CcdPhysics/CcdPhysicsEnvironment.cpp b/extern/bullet/Extras/PhysicsInterface/CcdPhysics/CcdPhysicsEnvironment.cpp
index 4359eeffffe..fd4bca40e7f 100644
--- a/extern/bullet/Extras/PhysicsInterface/CcdPhysics/CcdPhysicsEnvironment.cpp
+++ b/extern/bullet/Extras/PhysicsInterface/CcdPhysics/CcdPhysicsEnvironment.cpp
@@ -508,6 +508,7 @@ bool	CcdPhysicsEnvironment::proceedDeltaTime(double curTime,float timeStep)
 
 
 
+
 	if (!SimdFuzzyZero(timeStep))
 	{
 
@@ -1300,9 +1301,9 @@ PHY_IPhysicsController* CcdPhysicsEnvironment::rayTest(PHY_IPhysicsController* i
 
 				ConvexShape* convexShape = (ConvexShape*) body->GetCollisionShape();
 				VoronoiSimplexSolver	simplexSolver;
-				//SubsimplexConvexCast convexCaster(&pointShape,convexShape,&simplexSolver);
+				SubsimplexConvexCast convexCaster(&pointShape,convexShape,&simplexSolver);
 				//GjkConvexCast	convexCaster(&pointShape,convexShape,&simplexSolver);
-				ContinuousConvexCollision convexCaster(&pointShape,convexShape,&simplexSolver,0);
+				//ContinuousConvexCollision convexCaster(&pointShape,convexShape,&simplexSolver,0);
 				
 				if (convexCaster.calcTimeOfImpact(rayFromTrans,rayToTrans,body->getCenterOfMassTransform(),body->getCenterOfMassTransform(),rayResult))
 				{
diff --git a/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp b/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
index 4359eeffffe..fd4bca40e7f 100644
--- a/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
+++ b/source/gameengine/Physics/Bullet/CcdPhysicsEnvironment.cpp
@@ -508,6 +508,7 @@ bool	CcdPhysicsEnvironment::proceedDeltaTime(double curTime,float timeStep)
 
 
 
+
 	if (!SimdFuzzyZero(timeStep))
 	{
 
@@ -1300,9 +1301,9 @@ PHY_IPhysicsController* CcdPhysicsEnvironment::rayTest(PHY_IPhysicsController* i
 
 				ConvexShape* convexShape = (ConvexShape*) body->GetCollisionShape();
 				VoronoiSimplexSolver	simplexSolver;
-				//SubsimplexConvexCast convexCaster(&pointShape,convexShape,&simplexSolver);
+				SubsimplexConvexCast convexCaster(&pointShape,convexShape,&simplexSolver);
 				//GjkConvexCast	convexCaster(&pointShape,convexShape,&simplexSolver);
-				ContinuousConvexCollision convexCaster(&pointShape,convexShape,&simplexSolver,0);
+				//ContinuousConvexCollision convexCaster(&pointShape,convexShape,&simplexSolver,0);
 				
 				if (convexCaster.calcTimeOfImpact(rayFromTrans,rayToTrans,body->getCenterOfMassTransform(),body->getCenterOfMassTransform(),rayResult))
 				{