diff --git a/misc/all-graph/3d_demo.py b/misc/all-graph/3d_demo.py
new file mode 100644
index 0000000..35fe558
--- /dev/null
+++ b/misc/all-graph/3d_demo.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+
+import numpy as np
+import igraph as ig
+import plotly.graph_objs as go
+import matplotlib.colors as mcolors
+
+
+def build_colors(max_step: int) -> list[str]:
+    bwr = ['#0000ff', '#e8daef', '#ff0000']
+    cmap = mcolors.LinearSegmentedColormap.from_list('custom_bwr', bwr)
+    return [mcolors.to_hex(cmap(x)) for x in np.linspace(0, 1, max_step + 1)]
+
+
+def build_3d_graph(graph: ig.Graph, colors: list[str], output: str) -> None:
+    layout = graph.layout('kk', dim=3)
+
+    Xn = [x[0] for x in layout]
+    Yn = [x[1] for x in layout]
+    Zn = [x[2] for x in layout]
+
+    Xe, Ye, Ze = [], [], []
+    for x, y in graph.get_edgelist():
+        Xe += [layout[x][0], layout[y][0], None]
+        Ye += [layout[x][1], layout[y][1], None]
+        Ze += [layout[x][2], layout[y][2], None]
+
+    edge_trace = go.Scatter3d(
+        x=Xe, y=Ye, z=Ze,
+        mode='lines',
+        line=dict(color='gray', width=2),
+        hoverinfo='none'
+    )
+
+    node_trace = go.Scatter3d(
+        x=Xn, y=Yn, z=Zn,
+        mode='markers',
+        marker=dict(
+            symbol='circle',
+            size=6,
+            color=[colors[x['step']] for x in graph.vs]
+        ),
+        hoverinfo='text',
+        text=[f'{x['tag']} ({x['step']}) [{'/'.join(x['codes'])}]' for x in graph.vs]
+    )
+
+    fig = go.Figure(data=[edge_trace, node_trace])
+    fig.update_layout(
+        showlegend=False,
+        margin=dict(l=0, r=0, b=0, t=0),
+        scene=dict(
+            xaxis=dict(showbackground=False),
+            yaxis=dict(showbackground=False),
+            zaxis=dict(showbackground=False),
+        )
+    )
+    fig.write_html(output)
+
+
+if __name__ == '__main__':
+    g = ig.Graph.Read_Pickle('1-00M-000X_DAAF4CC-core.pkl')
+    build_3d_graph(g, build_colors(93), '1-00M-000X_3d-core.html')