diff --git a/stepmania/src/RageDisplay.cpp b/stepmania/src/RageDisplay.cpp
index 3adfc0e1ab..e571e644ff 100644
--- a/stepmania/src/RageDisplay.cpp
+++ b/stepmania/src/RageDisplay.cpp
@@ -54,7 +54,6 @@ int					g_glVersion;
 int RageDisplay::GetFPS() const { return g_iFPS; }
 int RageDisplay::GetVPF() const { return g_iVPF; }
 int RageDisplay::GetDPF() const { return g_iDPF; }
-DEVMODE SMGfx;
 
 static int			g_iFramesRenderedSinceLastCheck,
 					g_iVertsRenderedSinceLastCheck,
@@ -371,7 +370,7 @@ void RageDisplay::Translate( float x, float y, float z )
 	RageMatrix matTemp;
 	RageMatrixTranslation( &matTemp, x, y, z );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTemp, &matTop );
+	sgPreMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::TranslateLocal( float x, float y, float z )
@@ -379,7 +378,7 @@ void RageDisplay::TranslateLocal( float x, float y, float z )
 	RageMatrix matTemp;
 	RageMatrixTranslation( &matTemp, x, y, z );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTop, &matTemp );
+	sgPostMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::Scale( float x, float y, float z )
@@ -387,7 +386,7 @@ void RageDisplay::Scale( float x, float y, float z )
 	RageMatrix matTemp;
 	RageMatrixScaling( &matTemp, x, y, z );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTemp, &matTop );
+	sgPreMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::RotateX( float r )
@@ -395,7 +394,7 @@ void RageDisplay::RotateX( float r )
 	RageMatrix matTemp;
 	RageMatrixRotationX( &matTemp, r );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTemp, &matTop );
+	sgPreMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::RotateY( float r )
@@ -403,7 +402,7 @@ void RageDisplay::RotateY( float r )
 	RageMatrix matTemp;
 	RageMatrixRotationY( &matTemp, r );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTemp, &matTop );
+	sgPreMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::RotateZ( float r )
@@ -411,7 +410,7 @@ void RageDisplay::RotateZ( float r )
 	RageMatrix matTemp;
 	RageMatrixRotationZ( &matTemp, r );
 	RageMatrix& matTop = GetTopModelMatrix();
-	RageMatrixMultiply( &matTop, &matTemp, &matTop );
+	sgPreMultMat4( matTop.m, matTemp.m );
 }
 
 void RageDisplay::SetTexture( RageTexture* pTexture )
diff --git a/stepmania/src/RageMath.cpp b/stepmania/src/RageMath.cpp
index cf927971c7..07de489d8d 100644
--- a/stepmania/src/RageMath.cpp
+++ b/stepmania/src/RageMath.cpp
@@ -15,55 +15,89 @@
 #include "RageTypes.h"
 #include "D3DX8Math.h"
 
+#ifdef _DEBUG
+#pragma comment(lib, "plib-1.6.0/sg_d.lib")
+#pragma comment(lib, "plib-1.6.0/ul_d.lib")
+#else
+#pragma comment(lib, "plib-1.6.0/sg.lib")
+#pragma comment(lib, "plib-1.6.0/ul.lib")
+#endif
 
 void RageVec2Normalize( RageVector2* pOut, const RageVector2* pV )
 {
-	D3DXVec2Normalize( (D3DXVECTOR2*)pOut, (const D3DXVECTOR2*)pV );
+	sgNormalizeVec2( (float*)pOut, (const float*)pV );
 }
 
 void RageVec3TransformCoord( RageVector3* pOut, const RageVector3* pV, const RageMatrix* pM )
 {
-	D3DXVec3TransformCoord( (D3DXVECTOR3*)pOut, (const D3DXVECTOR3*)pV, (const D3DXMATRIX*)pM );
+	sgFullXformPnt3 ( (float*)pOut, (float*)pV, pM->m );
 }
 
 void RageMatrixIdentity( RageMatrix* pOut )
 {
-	D3DXMatrixIdentity( (D3DXMATRIX*)pOut );
+	sgMakeIdentMat4( pOut->m );
 }
 
 void RageMatrixMultiply( RageMatrix* pOut, const RageMatrix* pA, const RageMatrix* pB )
 {
-	D3DXMatrixMultiply( (D3DXMATRIX*)pOut, (const D3DXMATRIX*)pA, (const D3DXMATRIX*)pB );
+	sgMultMat4( pOut->m, pB->m, pA->m );
 }
 
 void RageMatrixTranslation( RageMatrix* pOut, float x, float y, float z )
 {
-	D3DXMatrixTranslation( (D3DXMATRIX*)pOut, x, y, z );
+	RageMatrixIdentity(pOut);
+	pOut->m[3][0] = x;
+	pOut->m[3][1] = y;
+	pOut->m[3][2] = z;
 }
 
 void RageMatrixScaling( RageMatrix* pOut, float x, float y, float z )
 {
-	D3DXMatrixScaling( (D3DXMATRIX*)pOut, x, y, z );
+	RageMatrixIdentity(pOut);
+	pOut->m[0][0] = x;
+	pOut->m[1][1] = y;
+	pOut->m[2][2] = z;
 }
 
 void RageMatrixRotationX( RageMatrix* pOut, float theta )
-{
-	D3DXMatrixRotationX( (D3DXMATRIX*)pOut, theta );
+{ /* UNTESTED */
+	RageMatrixIdentity(pOut);
+	pOut->m[1][1] = cosf(theta);
+	pOut->m[2][2] = pOut->m[1][1];
+
+	pOut->m[2][1] = sinf(theta);
+	pOut->m[1][2] = -pOut->m[2][1];
 }
 
 void RageMatrixRotationY( RageMatrix* pOut, float theta )
-{
-	D3DXMatrixRotationY( (D3DXMATRIX*)pOut, theta );
+{ /* UNTESTED */
+	RageMatrixIdentity(pOut);
+	pOut->m[0][0] = cosf(theta);
+	pOut->m[2][2] = pOut->m[0][0];
+
+	pOut->m[0][2] = sinf(theta);
+	pOut->m[2][0] = -pOut->m[0][2];
 }
 
 void RageMatrixRotationZ( RageMatrix* pOut, float theta )
 {
-	D3DXMatrixRotationZ( (D3DXMATRIX*)pOut, theta );
+	RageMatrixIdentity(pOut);
+	pOut->m[0][0] = cosf(theta);
+	pOut->m[1][1] = pOut->m[0][0];
+
+	pOut->m[0][1] = sinf(theta);
+	pOut->m[1][0] = -pOut->m[0][1];
 }
 
 void RageMatrixOrthoOffCenterLH( RageMatrix* pOut, float l, float r, float b, float t, float zn, float zf )
 {
-	D3DXMatrixOrthoOffCenterLH( (D3DXMATRIX*)pOut, l, r, b, t, zn, zf );
+	RageMatrixIdentity(pOut);
+	pOut->m[0][0] = 2 / (r-l);
+	pOut->m[1][1] = 2 / (t-b);
+	pOut->m[2][2] = -2 / (zn-zf);
+	pOut->m[3][0] = -(r+l)/(r-l);
+	pOut->m[3][1] = -(t+b)/(t-b);
+	pOut->m[3][2] = -(zf+zn)/(zn-zf);
 }
 
 void RageMatrixLookAtLH( RageMatrix* pOut, const RageVector3* pEye, const RageVector3* pAt, const RageVector3* pUp )
@@ -75,5 +109,3 @@ void RageMatrixPerspectiveFovLH( RageMatrix* pOut, float fovy, float Aspect, flo
 {
 	D3DXMatrixPerspectiveFovLH( (D3DXMATRIX*)pOut, fovy, Aspect, zn, zf );
 }
-
-
diff --git a/stepmania/src/RageMath.h b/stepmania/src/RageMath.h
index c4090e8163..d5a377e388 100644
--- a/stepmania/src/RageMath.h
+++ b/stepmania/src/RageMath.h
@@ -15,6 +15,7 @@ struct RageVector2;
 struct RageVector3;
 struct RageMatrix;
 
+#include "plib-1.6.0/sg.h"
 
 void RageVec2Normalize( RageVector2* pOut, const RageVector2* pV );
 void RageVec3TransformCoord( RageVector3* pOut, const RageVector3* pV, const RageMatrix* pM );