diff --git a/library/PolyVoxCore/include/PolyVoxCore/BaseVolume.h b/library/PolyVoxCore/include/PolyVoxCore/BaseVolume.h
index 2d5f4301..d33d6b4c 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/BaseVolume.h
+++ b/library/PolyVoxCore/include/PolyVoxCore/BaseVolume.h
@@ -109,6 +109,8 @@ namespace PolyVox
 			inline VoxelType peekVoxel1px1py1pz(void) const;
 
 		protected:
+			bool isCurrentPositionValid(void) const;
+
 			DerivedVolumeType* mVolume;
 
 			//The current position in the volume
@@ -118,6 +120,12 @@ namespace PolyVox
 
 			WrapMode m_eWrapMode;
 			VoxelType m_tBorder;
+
+			//Whether the current position is inside the volume
+			//FIXME - Replace these with flags
+			bool m_bIsCurrentPositionValidInX;
+			bool m_bIsCurrentPositionValidInY;
+			bool m_bIsCurrentPositionValidInZ;
 		};
 		#endif
 
diff --git a/library/PolyVoxCore/include/PolyVoxCore/BaseVolumeSampler.inl b/library/PolyVoxCore/include/PolyVoxCore/BaseVolumeSampler.inl
index 27275507..f4590196 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/BaseVolumeSampler.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/BaseVolumeSampler.inl
@@ -32,6 +32,9 @@ namespace PolyVox
 		,mZPosInVolume(0)
 		,m_eWrapMode(WrapModes::Border)
 		,m_tBorder(0)
+		,m_bIsCurrentPositionValidInX(false)
+		,m_bIsCurrentPositionValidInY(false)
+		,m_bIsCurrentPositionValidInZ(false)
 	{
 	}
 
@@ -59,9 +62,7 @@ namespace PolyVox
 	template <typename DerivedVolumeType>
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::setPosition(const Vector3DInt32& v3dNewPos)
 	{
-		mXPosInVolume = v3dNewPos.getX();
-		mYPosInVolume = v3dNewPos.getY();
-		mZPosInVolume = v3dNewPos.getZ();
+		setPosition(v3dNewPos.getX(), v3dNewPos.getY(), v3dNewPos.getZ());
 	}
 
 	template <typename VoxelType>
@@ -71,6 +72,10 @@ namespace PolyVox
 		mXPosInVolume = xPos;
 		mYPosInVolume = yPos;
 		mZPosInVolume = zPos;
+
+		m_bIsCurrentPositionValidInX = mVolume->getEnclosingRegion().containsPointInX(xPos);
+		m_bIsCurrentPositionValidInY = mVolume->getEnclosingRegion().containsPointInY(yPos);
+		m_bIsCurrentPositionValidInZ = mVolume->getEnclosingRegion().containsPointInZ(zPos);
 	}
 
 	template <typename VoxelType>
@@ -93,6 +98,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::movePositiveX(void)
 	{
 		mXPosInVolume++;
+		m_bIsCurrentPositionValidInX = mVolume->getEnclosingRegion().containsPointInX(mXPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -100,6 +106,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::movePositiveY(void)
 	{
 		mYPosInVolume++;
+		m_bIsCurrentPositionValidInY = mVolume->getEnclosingRegion().containsPointInY(mYPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -107,6 +114,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::movePositiveZ(void)
 	{
 		mZPosInVolume++;
+		m_bIsCurrentPositionValidInZ = mVolume->getEnclosingRegion().containsPointInZ(mZPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -114,6 +122,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::moveNegativeX(void)
 	{
 		mXPosInVolume--;
+		m_bIsCurrentPositionValidInX = mVolume->getEnclosingRegion().containsPointInX(mXPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -121,6 +130,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::moveNegativeY(void)
 	{
 		mYPosInVolume--;
+		m_bIsCurrentPositionValidInY = mVolume->getEnclosingRegion().containsPointInY(mYPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -128,6 +138,7 @@ namespace PolyVox
 	void BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::moveNegativeZ(void)
 	{
 		mZPosInVolume--;
+		m_bIsCurrentPositionValidInZ = mVolume->getEnclosingRegion().containsPointInZ(mZPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -322,4 +333,11 @@ namespace PolyVox
 	{
 		return mVolume->getVoxelAt(mXPosInVolume + 1, mYPosInVolume + 1, mZPosInVolume + 1);
 	}
+
+	template <typename VoxelType>
+	template <typename DerivedVolumeType>
+	bool inline BaseVolume<VoxelType>::Sampler<DerivedVolumeType>::isCurrentPositionValid(void) const
+	{
+		return m_bIsCurrentPositionValidInX && m_bIsCurrentPositionValidInY && m_bIsCurrentPositionValidInZ;
+	}
 }
diff --git a/library/PolyVoxCore/include/PolyVoxCore/RawVolume.h b/library/PolyVoxCore/include/PolyVoxCore/RawVolume.h
index c740a384..a3660e7c 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/RawVolume.h
+++ b/library/PolyVoxCore/include/PolyVoxCore/RawVolume.h
@@ -105,17 +105,9 @@ namespace PolyVox
 
 		private:
 			VoxelType getVoxelAt(int32_t uXPos, int32_t uYPos, int32_t uZPos) const;
-			bool isCurrentPositionValid(void) const;
-
 
 			//Other current position information
 			VoxelType* mCurrentVoxel;
-
-			//Whether the current position is inside the volume
-			//FIXME - Replace these with flags
-			bool m_bIsCurrentPositionValidInX;
-			bool m_bIsCurrentPositionValidInY;
-			bool m_bIsCurrentPositionValidInZ;
 		};
 		#endif
 
diff --git a/library/PolyVoxCore/include/PolyVoxCore/RawVolumeSampler.inl b/library/PolyVoxCore/include/PolyVoxCore/RawVolumeSampler.inl
index a6b5d95e..290346a7 100644
--- a/library/PolyVoxCore/include/PolyVoxCore/RawVolumeSampler.inl
+++ b/library/PolyVoxCore/include/PolyVoxCore/RawVolumeSampler.inl
@@ -36,9 +36,6 @@ namespace PolyVox
 	RawVolume<VoxelType>::Sampler::Sampler(RawVolume<VoxelType>* volume)
 		:BaseVolume<VoxelType>::template Sampler< RawVolume<VoxelType> >(volume)
 		,mCurrentVoxel(0)
-		,m_bIsCurrentPositionValidInX(false)
-		,m_bIsCurrentPositionValidInY(false)
-		,m_bIsCurrentPositionValidInZ(false)
 	{
 	}
 
@@ -69,10 +66,10 @@ namespace PolyVox
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::setPosition(int32_t xPos, int32_t yPos, int32_t zPos)
 	{
-		this->mXPosInVolume = xPos;
-		this->mYPosInVolume = yPos;
-		this->mZPosInVolume = zPos;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::setPosition(xPos, yPos, zPos);
 
+		// Then we update the voxel pointer
 		const Vector3DInt32& v3dLowerCorner = this->mVolume->m_regValidRegion.getLowerCorner();
 		int32_t iLocalXPos = xPos - v3dLowerCorner.getX();
 		int32_t iLocalYPos = yPos - v3dLowerCorner.getY();
@@ -83,10 +80,6 @@ namespace PolyVox
 				iLocalZPos * this->mVolume->getWidth() * this->mVolume->getHeight();
 
 		mCurrentVoxel = this->mVolume->m_pData + uVoxelIndex;
-
-		m_bIsCurrentPositionValidInX = this->mVolume->getEnclosingRegion().containsPointInX(xPos);
-		m_bIsCurrentPositionValidInY = this->mVolume->getEnclosingRegion().containsPointInY(yPos);
-		m_bIsCurrentPositionValidInZ = this->mVolume->getEnclosingRegion().containsPointInZ(zPos);
 	}
 
 	template <typename VoxelType>
@@ -107,49 +100,61 @@ namespace PolyVox
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::movePositiveX(void)
 	{
-		this->mXPosInVolume++;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::movePositiveX();
+
+		// Then we update the voxel pointer
 		++mCurrentVoxel;
-		m_bIsCurrentPositionValidInX = this->mVolume->getEnclosingRegion().containsPointInX(this->mXPosInVolume);
 	}
 
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::movePositiveY(void)
 	{
-		this->mYPosInVolume++;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::movePositiveY();
+
+		// Then we update the voxel pointer
 		mCurrentVoxel += this->mVolume->getWidth();
-		m_bIsCurrentPositionValidInY = this->mVolume->getEnclosingRegion().containsPointInY(this->mYPosInVolume);
 	}
 
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::movePositiveZ(void)
 	{
-		this->mZPosInVolume++;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::movePositiveZ();
+
+		// Then we update the voxel pointer
 		mCurrentVoxel += this->mVolume->getWidth() * this->mVolume->getHeight();
-		m_bIsCurrentPositionValidInZ = this->mVolume->getEnclosingRegion().containsPointInZ(this->mZPosInVolume);
 	}
 
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::moveNegativeX(void)
 	{
-		this->mXPosInVolume--;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::moveNegativeX();
+
+		// Then we update the voxel pointer
 		--mCurrentVoxel;
-		m_bIsCurrentPositionValidInX = this->mVolume->getEnclosingRegion().containsPointInX(this->mXPosInVolume);
 	}
 
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::moveNegativeY(void)
 	{
-		this->mYPosInVolume--;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::moveNegativeY();
+
+		// Then we update the voxel pointer
 		mCurrentVoxel -= this->mVolume->getWidth();
-		m_bIsCurrentPositionValidInY = this->mVolume->getEnclosingRegion().containsPointInY(this->mYPosInVolume);
 	}
 
 	template <typename VoxelType>
 	void RawVolume<VoxelType>::Sampler::moveNegativeZ(void)
 	{
-		this->mZPosInVolume--;
+		// Base version updates position and validity flags.
+		BaseVolume<VoxelType>::Sampler< RawVolume<VoxelType> >::moveNegativeZ();
+
+		// Then we update the voxel pointer
 		mCurrentVoxel -= this->mVolume->getWidth() * this->mVolume->getHeight();
-		m_bIsCurrentPositionValidInZ = this->mVolume->getEnclosingRegion().containsPointInZ(this->mZPosInVolume);
 	}
 
 	template <typename VoxelType>
@@ -463,12 +468,6 @@ namespace PolyVox
 			}
 		}
 	}
-
-	template <typename VoxelType>
-	bool RawVolume<VoxelType>::Sampler::isCurrentPositionValid(void) const
-	{
-		return m_bIsCurrentPositionValidInX && m_bIsCurrentPositionValidInY && m_bIsCurrentPositionValidInZ;
-	}
 }
 
 #undef CAN_GO_NEG_X