diff --git a/RSP.cpp b/RSP.cpp
index 5807ab1c..c4a3eb6c 100644
--- a/RSP.cpp
+++ b/RSP.cpp
@@ -288,4 +288,5 @@ void RSP_Init()
 	gSP.objMatrix.Y = 0.0f;
 	gSP.objMatrix.baseScaleX = 1.0f;
 	gSP.objMatrix.baseScaleY = 1.0f;
+	gSP.objRendermode = 0;
 }
diff --git a/S2DEX.cpp b/S2DEX.cpp
index 75631aee..b760c19d 100644
--- a/S2DEX.cpp
+++ b/S2DEX.cpp
@@ -51,7 +51,7 @@ void S2DEX_Select_DL( u32 w0, u32 w1 )
 
 void S2DEX_Obj_RenderMode( u32 w0, u32 w1 )
 {
-	LOG(LOG_WARNING, "S2DEX_Obj_RenderMode unimplemented\n");
+	gSPObjRendermode(w1);
 }
 
 void S2DEX_Obj_Rectangle_R( u32 w0, u32 w1 )
diff --git a/S2DEX.h b/S2DEX.h
index 8aeaca1c..a608e132 100644
--- a/S2DEX.h
+++ b/S2DEX.h
@@ -1,11 +1,19 @@
 #ifndef S2DEX_H
 #define S2DEX_H
 
-#define	G_BGLT_LOADBLOCK	0x0033
-#define	G_BGLT_LOADTILE		0xfff4
+#define	G_BGLT_LOADBLOCK		0x0033
+#define	G_BGLT_LOADTILE			0xfff4
 
-#define	G_BG_FLAG_FLIPS		0x01
-#define	G_BG_FLAG_FLIPT		0x10
+#define	G_BG_FLAG_FLIPS			0x01
+#define	G_BG_FLAG_FLIPT			0x10
+
+#define	G_OBJRM_NOTXCLAMP		0x01
+#define	G_OBJRM_XLU				0x02
+#define	G_OBJRM_ANTIALIAS		0x04
+#define	G_OBJRM_BILERP			0x08
+#define	G_OBJRM_SHRINKSIZE_1	0x10
+#define	G_OBJRM_SHRINKSIZE_2	0x20
+#define	G_OBJRM_WIDEN			0x40
 
 struct uObjScaleBg
 {
diff --git a/gSP.cpp b/gSP.cpp
index 8a54d26b..35515b2b 100644
--- a/gSP.cpp
+++ b/gSP.cpp
@@ -2453,6 +2453,11 @@ void gSPObjSubMatrix( u32 mtx )
 	gSP.objMatrix.baseScaleY = _FIXED2FLOAT(objMtx->BaseScaleY, 10);
 }
 
+void gSPObjRendermode(u32 _mode)
+{
+	gSP.objRendermode = _mode;
+}
+
 #ifdef __VEC4_OPT
 void (*gSPTransformVertex4)(u32 v, float mtx[4][4]) =
 		gSPTransformVertex4_default;
diff --git a/gSP.h b/gSP.h
index f984a6bf..0c44050b 100644
--- a/gSP.h
+++ b/gSP.h
@@ -104,6 +104,8 @@ struct gSPInfo
 		f32 baseScaleX, baseScaleY;
 	} objMatrix;
 
+	u32 objRendermode;
+
 	u32 vertexColorBase;
 	u32 vertexi;
 
@@ -207,6 +209,7 @@ void gSPBgRect1Cyc( u32 bg );
 void gSPBgRectCopy( u32 bg );
 void gSPObjMatrix( u32 mtx );
 void gSPObjSubMatrix( u32 mtx );
+void gSPObjRendermode(u32 _mode);
 void gSPSetDMAOffsets( u32 mtxoffset, u32 vtxoffset );
 void gSPSetDMATexOffset(u32 _addr);
 void gSPSetVertexColorBase( u32 base );