Initial LTX 2.0 transformer implementation

src/diffusers/__init__.py

@@ -236,6 +236,7 @@ else:
             "Kandinsky5Transformer3DModel",
             "LatteTransformer3DModel",
             "LTXVideoTransformer3DModel",
+            "LTX2VideoTransformer3DModel",
             "Lumina2Transformer2DModel",
             "LuminaNextDiT2DModel",
             "MochiTransformer3DModel",
@@ -969,6 +970,7 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
             Kandinsky5Transformer3DModel,
             LatteTransformer3DModel,
             LTXVideoTransformer3DModel,
+            LTX2VideoTransformer3DModel,
             Lumina2Transformer2DModel,
             LuminaNextDiT2DModel,
             MochiTransformer3DModel,

src/diffusers/models/__init__.py

@@ -102,6 +102,7 @@ if is_torch_available():
     _import_structure["transformers.transformer_hunyuanimage"] = ["HunyuanImageTransformer2DModel"]
     _import_structure["transformers.transformer_kandinsky"] = ["Kandinsky5Transformer3DModel"]
     _import_structure["transformers.transformer_ltx"] = ["LTXVideoTransformer3DModel"]
+    _import_structure["transformers.transformer_ltx2"] = ["LTX2VideoTransformer3DModel"]
     _import_structure["transformers.transformer_lumina2"] = ["Lumina2Transformer2DModel"]
     _import_structure["transformers.transformer_mochi"] = ["MochiTransformer3DModel"]
     _import_structure["transformers.transformer_omnigen"] = ["OmniGenTransformer2DModel"]
@@ -209,6 +210,7 @@ if TYPE_CHECKING or DIFFUSERS_SLOW_IMPORT:
             Kandinsky5Transformer3DModel,
             LatteTransformer3DModel,
             LTXVideoTransformer3DModel,
+            LTX2VideoTransformer3DModel,
             Lumina2Transformer2DModel,
             LuminaNextDiT2DModel,
             MochiTransformer3DModel,

src/diffusers/models/transformers/__init__.py

@@ -34,6 +34,7 @@ if is_torch_available():
     from .transformer_hunyuanimage import HunyuanImageTransformer2DModel
     from .transformer_kandinsky import Kandinsky5Transformer3DModel
     from .transformer_ltx import LTXVideoTransformer3DModel
+    from .transformer_ltx2 import LTX2VideoTransformer3DModel
     from .transformer_lumina2 import Lumina2Transformer2DModel
     from .transformer_mochi import MochiTransformer3DModel
     from .transformer_omnigen import OmniGenTransformer2DModel