Fix dark texture: revert tex_mode default to stochastic and restore alpha preprocessing

app.py

@@ -29,22 +29,12 @@ import o_voxel
 import importlib.util
 import sys
 _local_postprocess = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'o-voxel', 'o_voxel', 'postprocess.py')
-print(f"[PATCH] Looking for local postprocess at: {_local_postprocess}")
-print(f"[PATCH] File exists: {os.path.exists(_local_postprocess)}")
 if os.path.exists(_local_postprocess):
     _spec = importlib.util.spec_from_file_location('o_voxel.postprocess', _local_postprocess)
     _mod = importlib.util.module_from_spec(_spec)
     _spec.loader.exec_module(_mod)
-    _has_fix = hasattr(_mod, '_clean_invalid_vertices')
-    print(f"[PATCH] Loaded local postprocess, has _clean_invalid_vertices: {_has_fix}")
-    print(f"[PATCH] Old module file: {getattr(o_voxel.postprocess, '__file__', 'unknown')}")
-    print(f"[PATCH] New module file: {getattr(_mod, '__file__', 'unknown')}")
     o_voxel.postprocess = _mod
     sys.modules['o_voxel.postprocess'] = _mod
-    print(f"[PATCH] Monkey-patch applied successfully")
-else:
-    print(f"[PATCH] WARNING: Local postprocess.py not found, using installed version")
-    print(f"[PATCH] Installed has _clean_invalid_vertices: {hasattr(o_voxel.postprocess, '_clean_invalid_vertices')}")
 
 
 MAX_SEED = np.iinfo(np.int32).max
@@ -380,13 +370,10 @@ def preprocess_image(input: Image.Image) -> Image.Image:
     size = int(size * 1)
     bbox = center[0] - size // 2, center[1] - size // 2, center[0] + size // 2, center[1] + size // 2
     output = output.crop(bbox)  # type: ignore
-    output_np = np.array(output).astype(np.float32)
-    rgb = output_np[:, :, :3]
-    alpha = output_np[:, :, 3:4] / 255.0
-    # Keep full RGB for visible pixels, zero out transparent background
-    mask = (alpha > 0.05).astype(np.float32)
-    rgb = rgb * mask
-    output = Image.fromarray(rgb.astype(np.uint8))
+    output_np = np.array(output)
+    alpha = output_np[:, :, 3]
+    output_np[:, :, :3][alpha < 0.5 * 255] = [0, 0, 0]
+    output = Image.fromarray(output_np[:, :, :3])
     return output
 
 
@@ -660,8 +647,6 @@ def extract_glb(
     shape_slat, tex_slat, res = unpack_state(state)
     mesh = pipeline.decode_latent(shape_slat, tex_slat, res)[0]
     mesh.simplify(16777216)  # nvdiffrast limit
-    print(f"[EXTRACT] Using postprocess from: {getattr(o_voxel.postprocess, '__file__', 'unknown')}")
-    print(f"[EXTRACT] Has _clean_invalid_vertices: {hasattr(o_voxel.postprocess, '_clean_invalid_vertices')}")
     glb = o_voxel.postprocess.to_glb(
         vertices=mesh.vertices,
         faces=mesh.faces,
@@ -734,7 +719,7 @@ with gr.Blocks(theme=gr.themes.Soft(primary_hue="orange", neutral_hue="slate"))
                     tex_slat_sampling_steps = gr.Slider(1, 50, label="Sampling Steps", value=12, step=1)
                     tex_slat_rescale_t = gr.Slider(1.0, 6.0, label="Rescale T", value=3.0, step=0.1)
                 multiimage_algo = gr.Radio(["stochastic", "multidiffusion"], label="Structure Algorithm", value="stochastic")
-                tex_multiimage_algo = gr.Radio(["stochastic", "multidiffusion"], label="Texture Algorithm", value="multidiffusion")
+                tex_multiimage_algo = gr.Radio(["stochastic", "multidiffusion"], label="Texture Algorithm", value="stochastic")
 
         with gr.Column(scale=10):
             preview_output = gr.HTML(empty_html, label="3D Asset Preview", show_label=True, container=True)