diff --git a/include/JSystem/J3DGraphBase/J3DTevs.h b/include/JSystem/J3DGraphBase/J3DTevs.h
index fbb3d6c94..e6bfc4598 100644
--- a/include/JSystem/J3DGraphBase/J3DTevs.h
+++ b/include/JSystem/J3DGraphBase/J3DTevs.h
@@ -41,15 +41,62 @@ struct J3DTevStage {
         setTevSwapModeInfo(j3dDefaultTevSwapMode);
     }
     J3DTevStage& operator=(const J3DTevStage& other) {
-        this->field_0x1 = other.field_0x1;
-        this->field_0x2 = other.field_0x2;
-        this->field_0x3 = other.field_0x3;
-        this->field_0x5 = other.field_0x5;
-        this->field_0x6 = other.field_0x6;
+        this->mTevColorOp = other.mTevColorOp;
+        this->mTevColorAB = other.mTevColorAB;
+        this->mTevColorCD = other.mTevColorCD;
+        this->mTevAlphaOp = other.mTevAlphaOp;
+        this->mTevAlphaAB = other.mTevAlphaAB;
         this->mTevSwapModeInfo = other.mTevSwapModeInfo;
         return *this;
     }
 
+    void setTevColorOp(u8 param_1, u8 param_2, u8 param_3, u8 param_4, u8 param_5) {
+        mTevColorOp = mTevColorOp & ~(0x01 << 2) | param_1 << 2;
+        if (param_1 <= 1) {
+            mTevColorOp = mTevColorOp & ~(0x03 << 4) | param_3 << 4;
+            mTevColorOp = mTevColorOp & ~0x03 | param_2;
+        } else {
+            mTevColorOp = mTevColorOp & ~(0x03 << 4) | (param_1 >> 1 & 3) << 4;
+            mTevColorOp = mTevColorOp & ~0x03 | 3;
+        }
+        mTevColorOp = mTevColorOp & ~(0x01 << 3) | param_4 << 3;
+        mTevColorOp = mTevColorOp & ~(0x03 << 6) | param_5 << 6;
+    }
+    void setTevColorAB(u8 a, u8 b) { mTevColorAB = a << 4 | b; }
+    void setTevColorCD(u8 c, u8 d) { mTevColorCD = c << 4 | d; }
+    void setAlphaA(u8 a) { mTevAlphaAB = mTevAlphaAB & ~(0x07 << 5) | a << 5; }
+    void setAlphaB(u8 b) { mTevAlphaAB = mTevAlphaAB & ~(0x07 << 2) | b << 2; }
+    void setAlphaC(u8 c) {
+        mTevAlphaAB = mTevAlphaAB & ~0x03 | c >> 1;
+        mTevSwapModeInfo = mTevSwapModeInfo & ~(0x01 << 7) | c << 7;
+    }
+    void setAlphaD(u8 d) { mTevSwapModeInfo = mTevSwapModeInfo & ~(0x07 << 4) | d << 4; }
+    void setAlphaABCD(u8 a, u8 b, u8 c, u8 d) {
+        setAlphaA(a);
+        setAlphaB(b);
+        setAlphaC(c);
+        setAlphaD(d);
+    }
+    void setTevAlphaOp(u8 param_1, u8 param_2, u8 param_3, u8 param_4, u8 param_5) {
+        mTevAlphaOp = mTevAlphaOp & ~(0x01 << 2) | param_1 << 2;
+        if (param_1 <= 1) {
+            mTevAlphaOp = mTevAlphaOp & ~0x03 | param_2;
+            mTevAlphaOp = mTevAlphaOp & ~(0x03 << 4) | param_3 << 4;
+        } else {
+            mTevAlphaOp = mTevAlphaOp & ~(0x03 << 4) | (param_1 >> 1 & 3) << 4;
+            mTevAlphaOp = mTevAlphaOp & ~0x03 | 3;
+        }
+        mTevAlphaOp = mTevAlphaOp & ~(0x01 << 3) | param_4 << 3;
+        mTevAlphaOp = mTevAlphaOp & ~(0x03 << 6) | param_5 << 6;
+    }
+    void setTevStageInfo(const J3DTevStageInfo& info) {
+        setTevColorOp(info.field_0x5, info.field_0x6, info.field_0x7, info.field_0x8, info.field_0x9);
+        setTevColorAB(info.field_0x1, info.field_0x2);
+        setTevColorCD(info.field_0x3, info.field_0x4);
+        setAlphaABCD(info.field_0xa, info.field_0xb, info.field_0xc, info.field_0xd);
+        setTevAlphaOp(info.field_0xe, info.field_0xf, info.field_0x10, info.field_0x11, info.field_0x12);
+    }
+
     void setTexSel(u8 param_0) { mTevSwapModeInfo = mTevSwapModeInfo & ~0x0C | param_0 << 2; }
     void setRasSel(u8 param_0) { mTevSwapModeInfo = mTevSwapModeInfo & ~0x03 | param_0; }
     void setTevSwapModeInfo(const J3DTevSwapModeInfo& info) {
@@ -57,20 +104,18 @@ struct J3DTevStage {
         setRasSel(info.field_0x0);
     }
 
-    void setTevStageInfo(const J3DTevStageInfo&);
-
     void load(u32) const {
         J3DGDWriteBPCmd(*(u32*)&field_0x0);
         J3DGDWriteBPCmd(*(u32*)&field_0x4);
     }
 
     /* 0x0 */ u8 field_0x0;
-    /* 0x1 */ u8 field_0x1;
-    /* 0x1 */ u8 field_0x2;
-    /* 0x3 */ u8 field_0x3;
+    /* 0x1 */ u8 mTevColorOp;
+    /* 0x1 */ u8 mTevColorAB;
+    /* 0x3 */ u8 mTevColorCD;
     /* 0x4 */ u8 field_0x4;
-    /* 0x5 */ u8 field_0x5;
-    /* 0x6 */ u8 field_0x6;
+    /* 0x5 */ u8 mTevAlphaOp;
+    /* 0x6 */ u8 mTevAlphaAB;
     /* 0x7 */ u8 mTevSwapModeInfo;
 };
 
diff --git a/src/m_Do/m_Do_ext.cpp b/src/m_Do/m_Do_ext.cpp
index 824d1d40e..041d0af5e 100644
--- a/src/m_Do/m_Do_ext.cpp
+++ b/src/m_Do/m_Do_ext.cpp
@@ -705,11 +705,6 @@ mDoExt_backupMatBlock_c::mDoExt_backupMatBlock_c() {
     /* Nonmatching */
 }
 
-/* 80010F44-8001110C       .text setTevStageInfo__11J3DTevStageFRC15J3DTevStageInfo */
-void J3DTevStage::setTevStageInfo(const J3DTevStageInfo&) {
-    /* Nonmatching */
-}
-
 /* 80011294-80011300       .text create__23mDoExt_backupMaterial_cFUs */
 bool mDoExt_backupMaterial_c::create(u16 param_0) {
     mBackupMatBlock = new mDoExt_backupMatBlock_c[param_0];