Pointmap: smaller radius (factor 0.7 → 0.5)

app.py

@@ -262,7 +262,7 @@ def _make_glb(image_pil_texture: Image.Image, pointmap_hwc: np.ndarray,
     # Factor 1.0 → balls just kiss neighbours; 1.5 → distinct overlap.
     if len(pts) >= 2:
         extent_diag = float(np.linalg.norm(np.ptp(pts, axis=0)))
-        r = max(extent_diag / np.sqrt(len(pts)) * 0.7, 1e-4)
+        r = max(extent_diag / np.sqrt(len(pts)) * 0.5, 1e-4)
     else:
         r = 0.005