diff --git a/comfy/ldm/lumina/model.py b/comfy/ldm/lumina/model.py
index 9e432d5c0..959748011 100644
--- a/comfy/ldm/lumina/model.py
+++ b/comfy/ldm/lumina/model.py
@@ -688,6 +688,7 @@ class NextDiT(nn.Module):
                 embeds += (siglip_feats,)
                 freqs_cis += (self.rope_embedder(siglip_pos_ids).movedim(1, 2),)
 
+        x = comfy.ldm.common_dit.pad_to_patch_size(x, (pH, pW))
         B, C, H, W = x.shape
         x = self.x_embedder(x.view(B, C, H // pH, pH, W // pW, pW).permute(0, 2, 4, 3, 5, 1).flatten(3).flatten(1, 2))
         x_pos_ids = pos_ids_x(cap_feats_len + 1, H // pH, W // pW, bsz, device, transformer_options=transformer_options)
diff --git a/comfy/lora.py b/comfy/lora.py
index 63ee85323..118a56ec8 100644
--- a/comfy/lora.py
+++ b/comfy/lora.py
@@ -429,9 +429,11 @@ def calculate_weight(patches, weight, key, intermediate_dtype=torch.float32, ori
             if output is None:
                 logging.warning("Calculate Weight Failed: {} {}".format(v.name, key))
             else:
-                weight = output
                 if old_weight is not None:
+                    old_weight.narrow(offset[0], offset[1], offset[2]).copy_(output)
                     weight = old_weight
+                else:
+                    weight = output
             continue
 
         if len(v) == 1:
diff --git a/comfy/model_detection.py b/comfy/model_detection.py
index 35a6822e3..ab260046f 100644
--- a/comfy/model_detection.py
+++ b/comfy/model_detection.py
@@ -1094,6 +1094,12 @@ def convert_diffusers_mmdit(state_dict, output_prefix=""):
         num_blocks = count_blocks(state_dict, 'transformer_blocks.{}.')
         depth = state_dict["pos_embed.proj.weight"].shape[0] // 64
         sd_map = comfy.utils.mmdit_to_diffusers({"depth": depth, "num_blocks": num_blocks}, output_prefix=output_prefix)
+    elif 'all_x_embedder.2-1.weight' in state_dict: #Z-Image (HuggingFace format)
+        w = state_dict.get('cap_embedder.1.weight')
+        hidden_size = w.shape[0] if w is not None else 3840
+        n_layers = count_blocks(state_dict, 'layers.{}.')
+        n_refiner = count_blocks(state_dict, 'noise_refiner.{}.')
+        sd_map = comfy.utils.z_image_to_diffusers({"n_layers": n_layers, "n_refiner_layers": n_refiner, "dim": hidden_size}, output_prefix=output_prefix)
     else:
         return None
 
diff --git a/comfy/sd.py b/comfy/sd.py
index 4d427bb9a..2e1033d94 100644
--- a/comfy/sd.py
+++ b/comfy/sd.py
@@ -1718,6 +1718,12 @@ def load_diffusion_model_state_dict(sd, model_options={}, metadata=None, disable
 
     if model_config is not None:
         new_sd = sd
+        # Z-Image from HuggingFace uses diffusers-style key names that need conversion
+        if model_config.unet_config.get('z_image_modulation', False) and 'all_x_embedder.2-1.weight' in new_sd:
+            sd_copy = dict(new_sd)
+            converted = model_detection.convert_diffusers_mmdit(sd_copy, "")
+            if converted is not None:
+                new_sd = {**sd_copy, **converted}
     else:
         new_sd = model_detection.convert_diffusers_mmdit(sd, "")
         if new_sd is not None: #diffusers mmdit
diff --git a/merge_zimage_models.py b/merge_zimage_models.py
new file mode 100644
index 000000000..bd839230d
--- /dev/null
+++ b/merge_zimage_models.py
@@ -0,0 +1,46 @@
+"""Merge Z-Image Turbo sharded safetensors into single files for ComfyUI."""
+import json
+import os
+from pathlib import Path
+from safetensors.torch import load_file, save_file
+
+SNAP = Path.home() / ".cache/huggingface/hub/models--Tongyi-MAI--Z-Image-Turbo/snapshots/f332072aa78be7aecdf3ee76d5c247082da564a6"
+OUT = Path.home() / "ComfyUI/models"
+
+def merge_shards(index_path, output_path, label):
+    print(f"\n=== Merging {label} ===")
+    with open(index_path) as f:
+        index = json.load(f)
+    weight_map = index["weight_map"]
+    shard_dir = Path(index_path).parent
+    shards = sorted(set(weight_map.values()))
+
+    merged = {}
+    for shard in shards:
+        print(f"  Loading {shard} ...")
+        tensors = load_file(str(shard_dir / shard))
+        merged.update(tensors)
+        print(f"  -> {len(tensors)} tensors, total so far: {len(merged)}")
+
+    print(f"  Saving to {output_path} ...")
+    os.makedirs(Path(output_path).parent, exist_ok=True)
+    save_file(merged, str(output_path))
+    size = Path(output_path).stat().st_size / 1e9
+    print(f"  Done! {size:.1f} GB")
+
+# 1. Merge transformer
+merge_shards(
+    SNAP / "transformer/diffusion_pytorch_model.safetensors.index.json",
+    OUT / "diffusion_models/z_image_turbo.safetensors",
+    "Transformer"
+)
+
+# 2. Merge text encoder (Qwen3)
+merge_shards(
+    SNAP / "text_encoder/model.safetensors.index.json",
+    OUT / "text_encoders/qwen3_z_image.safetensors",
+    "Text Encoder (Qwen3)"
+)
+
+print("\n=== All done! ===")
+print("Models ready in ComfyUI/models/")