diff --git a/src/cu.c b/src/cu.c
index 8c806733..e84526bd 100644
--- a/src/cu.c
+++ b/src/cu.c
@@ -372,10 +372,10 @@ int uvg_count_available_edge_cus(const cu_loc_t* const cu_loc, const lcu_t* cons
     while (LCU_GET_CU_AT_PX(lcu, cu_loc->local_x - TR_MIN_WIDTH, cu_loc->local_y + amount)->type != CU_NOTSET && (cu_loc->local_y + amount) < LCU_WIDTH) {
       amount += TR_MIN_WIDTH;
     }
-    return amount / TR_MIN_WIDTH;
+    return MAX(amount / TR_MIN_WIDTH, cu_loc->height / TR_MIN_WIDTH);
   }
   while (LCU_GET_CU_AT_PX(lcu, cu_loc->local_x + amount, cu_loc->local_y - TR_MIN_WIDTH)->type != CU_NOTSET && cu_loc->local_x + amount < LCU_WIDTH) {
     amount += TR_MIN_WIDTH;
   }
-  return amount / TR_MIN_WIDTH;
+  return MAX(amount / TR_MIN_WIDTH, cu_loc->width / TR_MIN_WIDTH);
 }
\ No newline at end of file
diff --git a/src/encode_coding_tree.c b/src/encode_coding_tree.c
index 9598afce..e255527b 100644
--- a/src/encode_coding_tree.c
+++ b/src/encode_coding_tree.c
@@ -625,25 +625,31 @@ static void encode_transform_coeff(
   const int x_cu = 8 * (x / 8);
   const int y_cu = 8 * (y / 8);
   const cu_info_t *cur_cu = uvg_cu_array_at_const(used_array, x, y); // TODO: very suspect, chroma cbfs stored in upper left corner, everything else in bottom right for depth 4
-  
-  int8_t split = (cu_loc->width > TR_MAX_WIDTH || cu_loc->height > TR_MAX_WIDTH);
+
+  const bool ver_split = cu_loc->height > TR_MAX_WIDTH;
+  const bool hor_split = cu_loc->width > TR_MAX_WIDTH;
 
   const int cb_flag_y = tree_type != UVG_CHROMA_T ? cbf_is_set(cur_pu->cbf, COLOR_Y) : 0;
   const int cb_flag_u = tree_type != UVG_LUMA_T ?( cur_pu->joint_cb_cr ? (cur_pu->joint_cb_cr >> 1) & 1 : cbf_is_set(cur_cu->cbf, COLOR_U)) : 0;
   const int cb_flag_v = tree_type != UVG_LUMA_T ? (cur_pu->joint_cb_cr ? cur_pu->joint_cb_cr & 1 : cbf_is_set(cur_cu->cbf, COLOR_V)) : 0;
 
 
-  if (split) {
-    int split_width  = width >> 1;
-    int split_height = height >> 1;
+  if (hor_split || ver_split) {
+    enum split_type split;
+    if (cu_loc->width > TR_MAX_WIDTH && cu_loc->height > TR_MAX_WIDTH) {
+      split = QT_SPLIT;
+    }
+    else if (cu_loc->width > TR_MAX_WIDTH) {
+      split = BT_VER_SPLIT;
+    }
+    else {
+      split = BT_HOR_SPLIT;
+    }
 
-    for (int j = 0; j < 2; j++) {
-      for (int i = 0; i < 2; i++) {
-        cu_loc_t loc;
-        uvg_cu_loc_ctor(&loc, (x + i * split_width), (y + j * split_height), width >> 1, height >> 1);
-
-        encode_transform_coeff(state, &loc, only_chroma, coeff, tree_type, true, luma_cbf_ctx, &loc);
-      }
+    cu_loc_t split_cu_loc[4];
+    const int split_count = uvg_get_split_locs(cu_loc, split, split_cu_loc);
+    for (int i = 0; i < split_count; ++i) {
+      encode_transform_coeff(state, &split_cu_loc[i], only_chroma, coeff, tree_type, true, luma_cbf_ctx, &split_cu_loc[i]);
     }
     return;
   }
diff --git a/src/intra.c b/src/intra.c
index 2c387a64..398ebc39 100644
--- a/src/intra.c
+++ b/src/intra.c
@@ -565,7 +565,7 @@ static void predict_cclm(
       y_extension >>= tree_type == UVG_CHROMA_T;
       const cu_info_t* pu = LCU_GET_CU_AT_PX(lcu, (x_scu >> (tree_type == UVG_CHROMA_T)) - 4, y_extension);
       if (y_extension >= ctu_size || pu->type == CU_NOTSET || (pu->type == CU_INTRA && pu->intra.mode_chroma == -1)) break;
-      if(x_scu == 32 && y_scu == 0 && pu->log2_width == 6) break;
+      if(x_scu == 32 && y_scu == 0 && pu->log2_height == 6 && pu->log2_width == 6 ) break;
     }
     for(int i = 0; i < height + available_left_below * 2; i++) {
       sampled_luma_ref.left[i] = state->tile->frame->cclm_luma_rec[(y0/2 + i) * (stride2/2) + x0 / 2 - 1];
@@ -1783,6 +1783,7 @@ static void intra_recon_tb_leaf(
   }
 }
 
+
 /**
  * \brief Reconstruct an intra CU
  *
@@ -1833,33 +1834,23 @@ void uvg_intra_recon_cu(
   }
 
   if (width > TR_MAX_WIDTH || height > TR_MAX_WIDTH) {
-    cu_loc_t split_cu_loc;
+    enum split_type split;
+    if (cu_loc->width > TR_MAX_WIDTH && cu_loc->height > TR_MAX_WIDTH) {
+      split = QT_SPLIT;
+    }
+    else if (cu_loc->width > TR_MAX_WIDTH) {
+      split = BT_VER_SPLIT;
+    }
+    else {
+      split = BT_HOR_SPLIT;
+    }
 
-    const int half_width = width / 2;
-    const int half_height = height / 2;
-    uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x, cu_loc->y, half_width, half_height);
-    uvg_intra_recon_cu(state, search_data, &split_cu_loc, NULL, lcu, tree_type, recon_luma, recon_chroma);
-    uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x + half_width, cu_loc->y, half_width, half_height);
-    uvg_intra_recon_cu(state, search_data, &split_cu_loc, NULL, lcu, tree_type, recon_luma, recon_chroma);
-    uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x, cu_loc->y + half_height, half_width, half_height);
-    uvg_intra_recon_cu(state, search_data, &split_cu_loc, NULL, lcu, tree_type, recon_luma, recon_chroma);
-    uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x + half_width, cu_loc->y + half_height, half_width, half_height);
-    uvg_intra_recon_cu(state, search_data, &split_cu_loc, NULL, lcu, tree_type, recon_luma, recon_chroma);
+    cu_loc_t split_cu_loc[4];
+    const int split_count = uvg_get_split_locs(cu_loc, split, split_cu_loc);
+    for (int i = 0; i < split_count; ++i) {
+      uvg_intra_recon_cu(state, search_data, &split_cu_loc[i], NULL, lcu, tree_type, recon_luma, recon_chroma);
+    }
 
-    // Propagate coded block flags from child CUs to parent CU.
-    uint16_t child_cbfs[3] = {
-      LCU_GET_CU_AT_PX(lcu, (lcu_px.x + half_width) >> (tree_type == UVG_CHROMA_T), lcu_px.y >> (tree_type == UVG_CHROMA_T))->cbf,
-      LCU_GET_CU_AT_PX(lcu, lcu_px.x >> (tree_type == UVG_CHROMA_T), (lcu_px.y + half_height) >> (tree_type == UVG_CHROMA_T))->cbf,
-      LCU_GET_CU_AT_PX(lcu, (lcu_px.x + half_width) >> (tree_type == UVG_CHROMA_T), (lcu_px.y + half_height) >> (tree_type == UVG_CHROMA_T))->cbf,
-    };
-
-    //if (recon_luma && depth <= MAX_DEPTH) {
-    //  cbf_set_conditionally(&cur_cu->cbf, child_cbfs, depth, COLOR_Y);
-    //}
-    //if (recon_chroma && depth <= MAX_DEPTH) {
-    //  cbf_set_conditionally(&cur_cu->cbf, child_cbfs, depth, COLOR_U);
-    //  cbf_set_conditionally(&cur_cu->cbf, child_cbfs, depth, COLOR_V);
-    //}
     return;
   }
   if (search_data->pred_cu.intra.isp_mode != ISP_MODE_NO_ISP && recon_luma ) {
diff --git a/src/search_intra.c b/src/search_intra.c
index 5a6355de..25340175 100644
--- a/src/search_intra.c
+++ b/src/search_intra.c
@@ -575,25 +575,24 @@ static double search_intra_trdepth(
   //     max_depth.
   // - Min transform size hasn't been reached (MAX_PU_DEPTH).
   else {
-    cu_loc_t split_cu_loc;
-
-    const int half_width = width / 2;
-    const int half_height = height / 2;
     split_cost = 0;
 
-    uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x, cu_loc->y, half_width, half_height);
-    split_cost += search_intra_trdepth(state, &split_cu_loc, nosplit_cost, search_data, lcu, tree_type);
-    if (split_cost < nosplit_cost) {
-      uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x + half_width, cu_loc->y, half_width, half_height);
-      split_cost += search_intra_trdepth(state, &split_cu_loc, nosplit_cost, search_data, lcu, tree_type);
+
+    enum split_type split;
+    if (cu_loc->width > TR_MAX_WIDTH && cu_loc->height > TR_MAX_WIDTH) {
+      split = QT_SPLIT;
     }
-    if (split_cost < nosplit_cost) {
-      uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x, cu_loc->y + half_height, half_width, half_height);
-      split_cost += search_intra_trdepth(state, &split_cu_loc, nosplit_cost, search_data, lcu, tree_type);
+    else if (cu_loc->width > TR_MAX_WIDTH) {
+      split = BT_VER_SPLIT;
     }
-    if (split_cost < nosplit_cost) {
-      uvg_cu_loc_ctor(&split_cu_loc, cu_loc->x + half_width, cu_loc->y + half_height, half_width, half_height);
-      split_cost += search_intra_trdepth(state, &split_cu_loc, nosplit_cost, search_data, lcu, tree_type);
+    else {
+      split = BT_HOR_SPLIT;
+    }
+
+    cu_loc_t split_cu_loc[4];
+    const int split_count = uvg_get_split_locs(cu_loc, split, split_cu_loc);
+    for (int i = 0; i < split_count; ++i) {
+      split_cost += search_intra_trdepth(state, &split_cu_loc[i], nosplit_cost, search_data, lcu, tree_type);
     }
   }
 
@@ -1821,7 +1820,7 @@ void uvg_search_cu_intra(
   }
 
   uint8_t num_mrl_modes = 0;
-  for(int line = 1; line < lines; ++line) {
+  for(int line = 1; line < lines && !is_large; ++line) {
     uvg_pixel extra_refs[128 * MAX_REF_LINE_IDX] = { 0 };
 
     if (luma_px.x > 0 && lcu_px.x == 0 && lcu_px.y > 0) {
diff --git a/src/transform.c b/src/transform.c
index 4734b672..968ae440 100644
--- a/src/transform.c
+++ b/src/transform.c
@@ -1400,25 +1400,27 @@ void uvg_quantize_lcu_residual(
   }
 
   if (cu_loc->width > TR_MAX_WIDTH || cu_loc->height > TR_MAX_WIDTH) {
+    enum split_type split;
+    if (cu_loc->width > TR_MAX_WIDTH && cu_loc->height > TR_MAX_WIDTH) {
+      split = QT_SPLIT;
+    }
+    else if (cu_loc->width > TR_MAX_WIDTH) {
+      split = BT_VER_SPLIT;
+    }
+    else {
+      split = BT_HOR_SPLIT;
+    }
 
-    // Split transform and increase depth
-    const int offset = width / 2;
-    for (int j = 0; j < 2; ++j) {
-      for (int i = 0; i < 2; ++i) {
-        cu_loc_t loc;
-        uvg_cu_loc_ctor(&loc, (x + i * offset), (y + j * offset), width >> 1, height >> 1);
-        // jccr is currently not supported if transform is split
-        uvg_quantize_lcu_residual(state, luma, chroma, 0, &loc, NULL, lcu, early_skip, tree_type);
+    cu_loc_t split_cu_loc[4];
+    uint16_t child_cbfs[3];
+    const int split_count = uvg_get_split_locs(cu_loc, split, split_cu_loc);
+    for (int i = 0; i < split_count; ++i) {
+      uvg_quantize_lcu_residual(state, luma, chroma, 0, &split_cu_loc[i], NULL, lcu, early_skip, tree_type);
+      if(i != 0) {
+        child_cbfs[i - 1] = LCU_GET_CU_AT_PX(lcu, split_cu_loc[i].local_x, split_cu_loc[i].local_y)->cbf;
       }
     }
-    
 
-    // Propagate coded block flags from child CUs to parent CU.
-    uint16_t child_cbfs[3] = {
-      LCU_GET_CU_AT_PX(lcu, lcu_px.x + offset, lcu_px.y         )->cbf,
-      LCU_GET_CU_AT_PX(lcu, lcu_px.x,          lcu_px.y + offset)->cbf,
-      LCU_GET_CU_AT_PX(lcu, lcu_px.x + offset, lcu_px.y + offset)->cbf,
-    };
     
     cur_pu->root_cbf = cbf_is_set_any(cur_pu->cbf)
       || cbf_is_set_any(child_cbfs[0])