diff --git a/libs/JSystem/include/JSystem/J3DGraphBase/J3DMatBlock.h b/libs/JSystem/include/JSystem/J3DGraphBase/J3DMatBlock.h
index a959609f45..7463562c3e 100644
--- a/libs/JSystem/include/JSystem/J3DGraphBase/J3DMatBlock.h
+++ b/libs/JSystem/include/JSystem/J3DGraphBase/J3DMatBlock.h
@@ -1755,6 +1755,16 @@ class J3DIndBlockNull : public J3DIndBlock {
     virtual ~J3DIndBlockNull() {}
 };
 
+#ifdef DUSK_TPHD
+struct PolygonOffset {
+    BE(f32) mFrontOffset;
+    BE(f32) mFrontScale;
+    BE(f32) mBackOffset;
+    BE(f32) mBackScale;
+    BE(f32) mClamp;
+};
+#endif
+
 /**
  * @ingroup jsystem-j3d
  *
@@ -1787,6 +1797,10 @@ class J3DPEBlock {
     virtual void setDither(u8 const*) {}
     virtual void setDither(u8) {}
     virtual u8 getDither() const { return 0; }
+#ifdef DUSK_TPHD
+    virtual void setPolygonOffset(const PolygonOffset&) {}
+    virtual PolygonOffset* getPolygonOffset() { return NULL; }
+#endif
     virtual u32 getFogOffset() const { return 0; }
     virtual void setFogOffset(u32) {}
     virtual ~J3DPEBlock() {}
@@ -1950,12 +1964,25 @@ class J3DPEBlockFull : public J3DPEBlock {
     virtual void setFogOffset(u32 fogOffset) { mFogOffset = fogOffset; }
     virtual ~J3DPEBlockFull() {}
 
+#ifdef DUSK_TPHD
+    virtual void setPolygonOffset(const PolygonOffset& offset) {
+        mPolygonOffset = offset;
+    }
+
+    virtual PolygonOffset* getPolygonOffset() {
+        return &mPolygonOffset;
+    }
+#endif
+
     /* 0x04 */ J3DFog mFog;
     /* 0x30 */ J3DAlphaComp mAlphaComp;
     /* 0x34 */ J3DBlend mBlend;
     /* 0x38 */ J3DZMode mZMode;
     /* 0x3A */ u8 mZCompLoc;
     /* 0x3B */ u8 mDither;
+#ifdef DUSK_TPHD
+    PolygonOffset mPolygonOffset;
+#endif
     /* 0x3C */ u32 mFogOffset;
 };  // Size: 0x40
 
diff --git a/libs/JSystem/include/JSystem/J3DGraphLoader/J3DMaterialFactory.h b/libs/JSystem/include/JSystem/J3DGraphLoader/J3DMaterialFactory.h
index 2820ca1e90..47e9b3e7d1 100644
--- a/libs/JSystem/include/JSystem/J3DGraphLoader/J3DMaterialFactory.h
+++ b/libs/JSystem/include/JSystem/J3DGraphLoader/J3DMaterialFactory.h
@@ -46,6 +46,13 @@ struct J3DMaterialInitData {
     /* 0x14A */ BE(u16) mNBTScaleIdx;
 }; // size 0x14C
 
+
+#ifdef DUSK_TPHD
+struct J3DMaterialInitData_MAT4 : public J3DMaterialInitData {
+    /* 0x14C */ BE(u16) mPolygonOffsetIdx;
+}; // size 0x14E
+#endif
+
 /**
  * @ingroup jsystem-j3d
  * 
@@ -85,33 +92,6 @@ struct J3DDisplayListInit {
     /* 0x4 */ BE(u32) field_0x4;
 }; // size 8
 
-#if DUSK_TPHD
-// MAT4 material-entry blocks have 2 trailing bytes per entry compared to MAT3.
-// This strided view skips over the extras at indexing time, leaving the
-// in-memory data untouched.
-class J3DMaterialInitDataView {
-public:
-    J3DMaterialInitDataView() : mpData(NULL), mStride(sizeof(J3DMaterialInitData)) {}
-
-    void set(const void* data, u32 stride) {
-        mpData = (u8*)data;
-        mStride = stride;
-    }
-
-    J3DMaterialInitData& operator[](int idx) {
-        return *(J3DMaterialInitData*)(mpData + (idx * mStride));
-    }
-
-    J3DMaterialInitData& operator[](int idx) const {
-        return *(J3DMaterialInitData*)(mpData + (idx * mStride));
-    }
-
-private:
-    u8* mpData;
-    u32 mStride;
-};
-#endif
-
 struct J3DTexCoord2Info;
 class J3DCurrentMtxInfo;
 
@@ -170,11 +150,26 @@ class J3DMaterialFactory {
     J3DNBTScale newNBTScale(int) const;
 
     u16 getMaterialID(int idx) const { return mpMaterialID[idx]; }
+#ifdef DUSK_TPHD
+    u8 getMaterialMode(int idx) const { return getMatInitData(idx)->mMaterialMode; }
+#else
     u8 getMaterialMode(int idx) const { return mpMaterialInitData[mpMaterialID[idx]].mMaterialMode; }
+#endif
     
+#if DUSK_TPHD
+    const PolygonOffset newPolygonOffset(int) const;
+
+    J3DMaterialInitData* getMatInitData(int idx) const {
+        static const u32 sInitDataSizes[] = {0, 0, 0x138, 0x14C, 0x14E};
+
+        return (J3DMaterialInitData*)((u8*)mpMaterialInitData + sInitDataSizes[mBlockType] * getMaterialID(idx));
+    }
+
+    u16 mBlockType;
+#endif
     /* 0x00 */ u16 mMaterialNum;
 #if DUSK_TPHD
-    /* 0x04 */ J3DMaterialInitDataView mpMaterialInitData;
+    /* 0x04 */ void* mpMaterialInitData;
 #else
     /* 0x04 */ J3DMaterialInitData* mpMaterialInitData;
 #endif
@@ -206,6 +201,9 @@ class J3DMaterialFactory {
     /* 0x6C */ u8* mpZCompLoc;
     /* 0x70 */ u8* mpDither;
     /* 0x74 */ J3DNBTScaleInfo* mpNBTScaleInfo;
+#ifdef DUSK_TPHD
+    PolygonOffset* mpPolygonOffsets;
+#endif
     /* 0x78 */ J3DDisplayListInit* mpDisplayListInit;
     /* 0x7C */ J3DPatchingInfo* mpPatchingInfo;
     /* 0x80 */ J3DCurrentMtxInfo* mpCurrentMtxInfo;
diff --git a/libs/JSystem/include/JSystem/J3DGraphLoader/J3DModelLoader.h b/libs/JSystem/include/JSystem/J3DGraphLoader/J3DModelLoader.h
index 6c856f1a3d..3b4627a9c7 100644
--- a/libs/JSystem/include/JSystem/J3DGraphLoader/J3DModelLoader.h
+++ b/libs/JSystem/include/JSystem/J3DGraphLoader/J3DModelLoader.h
@@ -169,6 +169,12 @@ struct J3DMaterialBlock_v21 : public J3DModelBlock {
     /* 0x74 */ OFFSET_PTR_V0 mpNBTScaleInfo;
 };
 
+#ifdef DUSK_TPHD
+struct J3DMaterialBlock_MAT4 : public J3DMaterialBlock {
+    /* 0x84 */ OFFSET_PTR_V0 mpPolygonOffsets;
+};
+#endif
+
 /**
  * @ingroup jsystem-j3d
  * 
diff --git a/libs/JSystem/src/J3DGraphLoader/J3DMaterialFactory.cpp b/libs/JSystem/src/J3DGraphLoader/J3DMaterialFactory.cpp
index 5aabde57aa..94bd257797 100644
--- a/libs/JSystem/src/J3DGraphLoader/J3DMaterialFactory.cpp
+++ b/libs/JSystem/src/J3DGraphLoader/J3DMaterialFactory.cpp
@@ -12,16 +12,11 @@
 #include "dusk/logging.h"
 
 J3DMaterialFactory::J3DMaterialFactory(J3DMaterialBlock const& i_block) {
+#ifdef DUSK_TPHD
+    mBlockType = (i_block.mBlockType & 0xFF) - 0x30; // get number at last byte of block name
+#endif
     mMaterialNum = i_block.mMaterialNum;
-#if DUSK_TPHD
-    u32 material_init_data_size = sizeof(J3DMaterialInitData);
-    if (i_block.mBlockType == 'MAT4') {
-        material_init_data_size += sizeof(u16);
-    }
-    mpMaterialInitData.set(JSUConvertOffsetToPtr<void>(&i_block, i_block.mpMaterialInitData), material_init_data_size);
-#else
     mpMaterialInitData = JSUConvertOffsetToPtr<J3DMaterialInitData>(&i_block, i_block.mpMaterialInitData);
-#endif
     mpMaterialID = JSUConvertOffsetToPtr<BE(u16)>(&i_block, i_block.mpMaterialID);
     if (i_block.mpIndInitData != (uintptr_t)NULL && (uintptr_t)i_block.mpIndInitData - (uintptr_t)i_block.mpNameTable > 4) {
         mpIndInitData = JSUConvertOffsetToPtr<J3DIndInitData>(&i_block, i_block.mpIndInitData);
@@ -54,6 +49,11 @@ J3DMaterialFactory::J3DMaterialFactory(J3DMaterialBlock const& i_block) {
     mpZCompLoc = JSUConvertOffsetToPtr<u8>(&i_block, i_block.mpZCompLoc);
     mpDither = JSUConvertOffsetToPtr<u8>(&i_block, i_block.mpDither);
     mpNBTScaleInfo = JSUConvertOffsetToPtr<J3DNBTScaleInfo>(&i_block, i_block.mpNBTScaleInfo);
+#ifdef DUSK_TPHD
+    if(mBlockType >= 4) {
+        mpPolygonOffsets = JSUConvertOffsetToPtr<PolygonOffset>(&i_block, reinterpret_cast<const J3DMaterialBlock_MAT4&>(i_block).mpPolygonOffsets);
+    }
+#endif
     mpDisplayListInit = NULL;
     mpPatchingInfo = NULL;
     mpCurrentMtxInfo = NULL;
@@ -62,11 +62,7 @@ J3DMaterialFactory::J3DMaterialFactory(J3DMaterialBlock const& i_block) {
 
 J3DMaterialFactory::J3DMaterialFactory(J3DMaterialDLBlock const& i_block) {
     mMaterialNum = i_block.mMaterialNum;
-#if DUSK_TPHD
-    mpMaterialInitData.set(NULL, sizeof(J3DMaterialInitData));
-#else
     mpMaterialInitData = NULL;
-#endif
     mpDisplayListInit = JSUConvertOffsetToPtr<J3DDisplayListInit>(&i_block, i_block.mpDisplayListInit);
     mpPatchingInfo = JSUConvertOffsetToPtr<J3DPatchingInfo>(&i_block, i_block.mpPatchingInfo);
     mpCurrentMtxInfo = JSUConvertOffsetToPtr<J3DCurrentMtxInfo>(&i_block, i_block.mpCurrentMtxInfo);
@@ -86,7 +82,11 @@ u16 J3DMaterialFactory::countUniqueMaterials() {
 }
 
 u32 J3DMaterialFactory::countTexGens(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTexGenNumIdx != 0xff) {
         return mpTexGenNum[mtl_init_data->mTexGenNumIdx];
     }
@@ -94,7 +94,11 @@ u32 J3DMaterialFactory::countTexGens(int i_idx) const {
 }
 
 u32 J3DMaterialFactory::countStages(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     u32 count1 = 0;
     u32 count2 = 0;
     if (mtl_init_data->mTevStageNumIdx != 0xff) {
@@ -169,6 +173,9 @@ J3DMaterial* J3DMaterialFactory::createNormalMaterial(J3DMaterial* i_material, i
     i_material->mPEBlock->setZMode(newZMode(i_idx));
     i_material->mPEBlock->setZCompLoc(newZCompLoc(i_idx));
     i_material->mPEBlock->setDither(newDither(i_idx));
+#ifdef DUSK_TPHD
+    i_material->mPEBlock->setPolygonOffset(newPolygonOffset(i_idx));
+#endif
     i_material->mTevBlock->setTevStageNum(newTevStageNum(i_idx));
     for (u8 i = 0; i < tex_num; i++) {
         i_material->mTevBlock->setTexNo(i, newTexNo(i_idx, i));
@@ -177,7 +184,11 @@ J3DMaterial* J3DMaterialFactory::createNormalMaterial(J3DMaterial* i_material, i
         i_material->mTevBlock->setTevOrder(i, newTevOrder(i_idx, i));
     }
     for (u8 i = 0; i < tev_stage_num_max; i++) {
+#ifdef DUSK_TPHD
+        J3DMaterialInitData* material_init_data = getMatInitData(i_idx);
+#else
         J3DMaterialInitData* material_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
         i_material->mTevBlock->setTevStage(i, newTevStage(i_idx, i));
         if (material_init_data->mTevSwapModeIdx[i] != 0xffff) {
             i_material->mTevBlock->getTevStage(i)->setTexSel(
@@ -212,7 +223,11 @@ J3DMaterial* J3DMaterialFactory::createNormalMaterial(J3DMaterial* i_material, i
     for (u8 i = 0; i < 8; i++) {
         i_material->mTexGenBlock->setTexMtx(i, newTexMtx(i_idx, i));
     }
-    J3DMaterialInitData* material_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#ifdef DUSK_TPHD
+        J3DMaterialInitData* material_init_data = getMatInitData(i_idx);
+#else
+        J3DMaterialInitData* material_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     for (u8 i = 0; i < tev_stage_num_max; i++) {
         if (material_init_data->mTevKColorSel[i] != 0xff) {
             i_material->mTevBlock->setTevKColorSel(i, material_init_data->mTevKColorSel[i]);
@@ -285,7 +300,11 @@ J3DMaterial* J3DMaterialFactory::createPatchedMaterial(J3DMaterial* i_material,
         i_material->mTevBlock->setTevColor(i, newTevColor(i_idx, i));
     }
     for (u8 i = 0; i < tev_stage_num; i++) {
+#ifdef DUSK_TPHD
+        J3DMaterialInitData* material_init_data = getMatInitData(i_idx);
+#else
         J3DMaterialInitData* material_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
         i_material->mTevBlock->setTevStage(i, newTevStage(i_idx, i));
         if (material_init_data->mTevSwapModeIdx[i] != 0xffff) {
             i_material->mTevBlock->getTevStage(i)->setTexSel(
@@ -294,7 +313,11 @@ J3DMaterial* J3DMaterialFactory::createPatchedMaterial(J3DMaterial* i_material,
                 mpTevSwapModeInfo[material_init_data->mTevSwapModeIdx[i]].mRasSel);
         }
     }
-    J3DMaterialInitData* init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#ifdef DUSK_TPHD
+        J3DMaterialInitData* init_data = getMatInitData(i_idx);
+#else
+        J3DMaterialInitData* init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     for (u8 i = 0; i < tev_stage_num; i++) {
         if (init_data->mTevKColorSel[i] != 0xff) {
             i_material->mTevBlock->setTevKColorSel(i, init_data->mTevKColorSel[i]);
@@ -435,7 +458,11 @@ u32 J3DMaterialFactory::calcSizeNormalMaterial(J3DMaterial* i_material, int i_id
     size += J3DMaterial::calcSizeTevBlock((u16)tev_stage_num_max);
     size += J3DMaterial::calcSizeIndBlock(ind_flag);
     size += J3DMaterial::calcSizePEBlock(pe_flag, getMaterialMode(i_idx));
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     for (u32 i = 0; i < 8; i++) {
         if (init_data->mTexMtxIdx[i] != 0xffff) {
             size += sizeof(J3DTexMtx);
@@ -456,7 +483,11 @@ u32 J3DMaterialFactory::calcSizePatchedMaterial(J3DMaterial* i_material, int i_i
     size += sizeof(J3DTevBlockPatched);
     size += J3DMaterial::calcSizeIndBlock(ind_flag);
     size += J3DMaterial::calcSizePEBlock(0x10000000, getMaterialMode(i_idx));
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     for (u32 i = 0; i < 8; i++) {
         if (init_data->mTexMtxIdx[i] != 0xffff) {
             size += sizeof(J3DTexMtx);
@@ -486,7 +517,11 @@ J3DGXColor J3DMaterialFactory::newMatColor(int i_idx, int i_no) const {
     #else
     J3DGXColor dflt = GXColor{0xff, 0xff, 0xff, 0xff};
     #endif
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mMatColorIdx[i_no] != 0xffff) {
         return (GXColor) mpMatColor[mtl_init_data->mMatColorIdx[i_no]];
     } else {
@@ -495,7 +530,11 @@ J3DGXColor J3DMaterialFactory::newMatColor(int i_idx, int i_no) const {
 }
 
 const u8 J3DMaterialFactory::newColorChanNum(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mColorChanNumIdx != 0xff) {
         return mpColorChanNum[mtl_init_data->mColorChanNumIdx];
     } else {
@@ -505,7 +544,11 @@ const u8 J3DMaterialFactory::newColorChanNum(int i_idx) const {
 
 J3DColorChan J3DMaterialFactory::newColorChan(int i_idx, int i_no) const {
     u32 r29 = 0;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (init_data->mColorChanIdx[i_no] != 0xffff) {
         return J3DColorChan(mpColorChanInfo[init_data->mColorChanIdx[i_no]]);
     } else {
@@ -519,7 +562,11 @@ J3DGXColor J3DMaterialFactory::newAmbColor(int i_idx, int i_no) const {
     #else
     J3DGXColor dflt = GXColor{0x32, 0x32, 0x32, 0x32};
     #endif
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mAmbColorIdx[i_no] != 0xffff) {
         return (GXColor) mpAmbColor[mtl_init_data->mAmbColorIdx[i_no]];
     } else {
@@ -529,7 +576,11 @@ J3DGXColor J3DMaterialFactory::newAmbColor(int i_idx, int i_no) const {
 
 u32 J3DMaterialFactory::newTexGenNum(int i_idx) const {
     u32 r30 = 0;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTexGenNumIdx != 0xff) {
         return mpTexGenNum[mtl_init_data->mTexGenNumIdx];
     } else {
@@ -538,7 +589,11 @@ u32 J3DMaterialFactory::newTexGenNum(int i_idx) const {
 }
 
 J3DTexCoord J3DMaterialFactory::newTexCoord(int i_idx, int i_no) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTexCoordIdx[i_no] != 0xffff) {
         return J3DTexCoord(mpTexCoordInfo[mtl_init_data->mTexCoordIdx[i_no]]);
     } else {
@@ -548,7 +603,11 @@ J3DTexCoord J3DMaterialFactory::newTexCoord(int i_idx, int i_no) const {
 
 J3DTexMtx* J3DMaterialFactory::newTexMtx(int i_idx, int i_no) const {
     J3DTexMtx* tex_mtx = NULL;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTexMtxIdx[i_no] != 0xffff) {
 #if TARGET_LITTLE_ENDIAN
         auto tex_mtx_info = mpTexMtxInfo[mtl_init_data->mTexMtxIdx[i_no]];
@@ -570,7 +629,11 @@ J3DTexMtx* J3DMaterialFactory::newTexMtx(int i_idx, int i_no) const {
 
 u8 J3DMaterialFactory::newCullMode(int i_idx) const {
     u32 r30 = 0;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mCullModeIdx != 0xff) {
         return mpCullMode[mtl_init_data->mCullModeIdx];
     } else {
@@ -579,7 +642,11 @@ u8 J3DMaterialFactory::newCullMode(int i_idx) const {
 }
 
 u16 J3DMaterialFactory::newTexNo(int i_idx, int i_no) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTexNoIdx[i_no] != 0xffff) {
         return mpTexNo[mtl_init_data->mTexNoIdx[i_no]];
     } else {
@@ -588,7 +655,11 @@ u16 J3DMaterialFactory::newTexNo(int i_idx, int i_no) const {
 }
 
 J3DTevOrder J3DMaterialFactory::newTevOrder(int i_idx, int i_no) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevOrderIdx[i_no] != 0xffff) {
         return J3DTevOrder(mpTevOrderInfo[mtl_init_data->mTevOrderIdx[i_no]]);
     } else {
@@ -599,7 +670,11 @@ J3DTevOrder J3DMaterialFactory::newTevOrder(int i_idx, int i_no) const {
 J3DGXColorS10 J3DMaterialFactory::newTevColor(int i_idx, int i_no) const {
     GXColorS10 _dflt = {0, 0, 0, 0};
     J3DGXColorS10 dflt = _dflt;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevColorIdx[i_no] != 0xffff) {
         return (GXColorS10) mpTevColor[mtl_init_data->mTevColorIdx[i_no]];
     } else {
@@ -613,7 +688,11 @@ J3DGXColor J3DMaterialFactory::newTevKColor(int i_idx, int i_no) const {
     #else
     J3DGXColor dflt = GXColor{0xff, 0xff, 0xff, 0xff};
     #endif
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevKColorIdx[i_no] != 0xffff) {
         return (GXColor) mpTevKColor[mtl_init_data->mTevKColorIdx[i_no]];
     } else {
@@ -622,7 +701,11 @@ J3DGXColor J3DMaterialFactory::newTevKColor(int i_idx, int i_no) const {
 }
 
 const u8 J3DMaterialFactory::newTevStageNum(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevStageNumIdx != 0xff) {
         return mpTevStageNum[mtl_init_data->mTevStageNumIdx];
     } else {
@@ -631,7 +714,11 @@ const u8 J3DMaterialFactory::newTevStageNum(int i_idx) const {
 }
 
 J3DTevStage J3DMaterialFactory::newTevStage(int i_idx, int i_no) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevStageIdx[i_no] != 0xffff) {
         return J3DTevStage(mpTevStageInfo[mtl_init_data->mTevStageIdx[i_no]]);
     } else {
@@ -640,7 +727,11 @@ J3DTevStage J3DMaterialFactory::newTevStage(int i_idx, int i_no) const {
 }
 
 J3DTevSwapModeTable J3DMaterialFactory::newTevSwapModeTable(int i_idx, int i_no) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mTevSwapModeTableIdx[i_no] != 0xffff) {
         return J3DTevSwapModeTable(mpTevSwapModeTableInfo[mtl_init_data->mTevSwapModeTableIdx[i_no]]);
     } else {
@@ -701,7 +792,11 @@ J3DIndTexCoordScale J3DMaterialFactory::newIndTexCoordScale(int i_idx, int i_no)
 
 J3DFog J3DMaterialFactory::newFog(int i_idx) const {
     J3DFog fog;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mFogIdx != 0xffff) {
 #if TARGET_LITTLE_ENDIAN
         J3DFogInfo fogInfo = mpFogInfo[mtl_init_data->mFogIdx];
@@ -721,7 +816,11 @@ J3DFog J3DMaterialFactory::newFog(int i_idx) const {
 }
 
 J3DAlphaComp J3DMaterialFactory::newAlphaComp(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mAlphaCompIdx != 0xffff) {
         return J3DAlphaComp(mpAlphaCompInfo[mtl_init_data->mAlphaCompIdx]);
     } else {
@@ -730,7 +829,11 @@ J3DAlphaComp J3DMaterialFactory::newAlphaComp(int i_idx) const {
 }
 
 J3DBlend J3DMaterialFactory::newBlend(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mBlendIdx != 0xffff) {
         return J3DBlend(mpBlendInfo[mtl_init_data->mBlendIdx]);
     } else {
@@ -740,7 +843,11 @@ J3DBlend J3DMaterialFactory::newBlend(int i_idx) const {
 
 J3DZMode J3DMaterialFactory::newZMode(int i_idx) const {
     u32 r29 = 0;
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mZModeIdx != 0xff) {
         return J3DZMode(mpZModeInfo[mtl_init_data->mZModeIdx]);
     } else {
@@ -749,7 +856,11 @@ J3DZMode J3DMaterialFactory::newZMode(int i_idx) const {
 }
 
 const u8 J3DMaterialFactory::newZCompLoc(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mZCompLocIdx != 0xff){
         return mpZCompLoc[mtl_init_data->mZCompLocIdx];
     } else {
@@ -758,7 +869,11 @@ const u8 J3DMaterialFactory::newZCompLoc(int i_idx) const {
 }
 
 const u8 J3DMaterialFactory::newDither(int i_idx) const {
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mDitherIdx != 0xff){
         return mpDither[mtl_init_data->mDitherIdx];
     } else {
@@ -766,9 +881,24 @@ const u8 J3DMaterialFactory::newDither(int i_idx) const {
     }
 }
 
+#ifdef DUSK_TPHD
+const PolygonOffset J3DMaterialFactory::newPolygonOffset(int i_idx) const {
+    J3DMaterialInitData_MAT4* mtl_init_data = (J3DMaterialInitData_MAT4*)getMatInitData(i_idx);
+    if (mBlockType >= 4 && mtl_init_data->mPolygonOffsetIdx != 0xffff){
+        return mpPolygonOffsets[mtl_init_data->mPolygonOffsetIdx];
+    } else {
+        return PolygonOffset{0.0f, 0.0f, 0.0f, 0.0f, 0.0f};
+    }
+}
+#endif
+
 J3DNBTScale J3DMaterialFactory::newNBTScale(int i_idx) const {
     J3DNBTScale dflt(j3dDefaultNBTScaleInfo);
+#ifdef DUSK_TPHD
+    J3DMaterialInitData* mtl_init_data = getMatInitData(i_idx);
+#else
     J3DMaterialInitData* mtl_init_data = &mpMaterialInitData[mpMaterialID[i_idx]];
+#endif
     if (mtl_init_data->mNBTScaleIdx != 0xffff) {
         return J3DNBTScale(mpNBTScaleInfo[mtl_init_data->mNBTScaleIdx]);
     } else {
diff --git a/libs/JSystem/src/J3DGraphLoader/J3DModelLoader.cpp b/libs/JSystem/src/J3DGraphLoader/J3DModelLoader.cpp
index a5409cd137..9841c103a9 100644
--- a/libs/JSystem/src/J3DGraphLoader/J3DModelLoader.cpp
+++ b/libs/JSystem/src/J3DGraphLoader/J3DModelLoader.cpp
@@ -104,7 +104,7 @@ J3DModelData* J3DModelLoader::load(void const* i_data, u32 i_flags) {
                 break;
             case 'MAT3':
 #if DUSK_TPHD
-            case 'MAT4':  // TODO: Real MAT4 support
+            case 'MAT4':
 #endif
                 readMaterial((J3DMaterialBlock*)block, (s32)i_flags);
                 break;
@@ -151,7 +151,7 @@ J3DMaterialTable* J3DModelLoader::loadMaterialTable(void const* i_data) {
         switch (block->mBlockType) {
             case 'MAT3':
 #if DUSK_TPHD
-            case 'MAT4':  // TODO: Real MAT4 support
+            case 'MAT4':
 #endif
                 readMaterialTable((J3DMaterialBlock*)block, flags);
                 break;
@@ -219,7 +219,7 @@ J3DModelData* J3DModelLoader::loadBinaryDisplayList(void const* i_data, u32 i_fl
                 break;
             case 'MAT3':
 #if DUSK_TPHD
-            case 'MAT4':  // TODO: Real MAT4 support
+            case 'MAT4':
 #endif
                 flags = 0x50100000;
                 flags |= (i_flags & 0x3000000);
diff --git a/libs/JSystem/src/J3DGraphLoader/J3DModelLoaderCalcSize.cpp b/libs/JSystem/src/J3DGraphLoader/J3DModelLoaderCalcSize.cpp
index eea522eb72..da562293d4 100644
--- a/libs/JSystem/src/J3DGraphLoader/J3DModelLoaderCalcSize.cpp
+++ b/libs/JSystem/src/J3DGraphLoader/J3DModelLoaderCalcSize.cpp
@@ -16,7 +16,6 @@ u16 J3DModelLoader::countMaterialNum(const void* stream) {
     const J3DModelBlock* block = header->mBlocks;
     for (int i = 0; i < header->mBlockNum; i++)
     {
-        // TODO: Real MAT4 support
         if (block->mBlockType == 'MAT3' || block->mBlockType == 'MAT4') {
             const J3DMaterialBlock* materialBlock = (const J3DMaterialBlock*)block;
             return materialBlock->mMaterialNum;
@@ -47,7 +46,6 @@ u32 J3DModelLoader::calcLoadSize(void const* stream, u32 flags_) {
             break;
         case 'MAT3':
         case 'MAT4':
-            // TODO: Real MAT4 support
             size += calcSizeMaterial((const J3DMaterialBlock*)nextBlock, flags);
             break;
         case 'SHP1':
@@ -90,7 +88,6 @@ u32 J3DModelLoader::calcLoadMaterialTableSize(const void* stream) {
         switch (nextBlock->mBlockType) {
         case 'MAT3':
         case 'MAT4':
-            // TODO: Real MAT4 support
             size += calcSizeMaterialTable((const J3DMaterialBlock*)nextBlock, flags);
             break;
         case 'TEX1':
@@ -142,7 +139,6 @@ u32 J3DModelLoader::calcLoadBinaryDisplayListSize(const void* stream, u32 flags)
 			break;
         case 'MAT3':
         case 'MAT4': {
-            // TODO: Real MAT4 support
 			u32 flags2 = (J3DMLF_21 | J3DMLF_Material_PE_Full | J3DMLF_Material_Color_LightOn);
             flags2 |= (u32)flags & (J3DMLF_Material_UseIndirect | J3DMLF_26);
 			mpMaterialBlock = (const J3DMaterialBlock*)nextBlock;