diff --git a/hdmitsuba/curves.cc b/hdmitsuba/curves.cc
index 127559e..3cf443e 100644
--- a/hdmitsuba/curves.cc
+++ b/hdmitsuba/curves.cc
@@ -189,13 +189,13 @@ void HdMitsubaCurves::Sync(HdSceneDelegate* sceneDelegate,
   // Pack control points [x, y, z, r] (lazy-evaluating widths based on layout)
   if (widths_.size() == points_.size()) {
     spec.control_points =
-        PackControlPoints(points_, [&](size_t i) { return widths_[i]; });
+        PackControlPoints(points_, [&](size_t i) { return widths_[i] * 0.5f; });
   } else if (widths_.size() == 1) {
-    float r = widths_[0];
+    float r = widths_[0] * 0.5f;
     spec.control_points =
         PackControlPoints(points_, [&](size_t /*i*/) { return r; });
   } else {
-    float uniform_radius = CalculateMeanWidth(widths_);
+    float uniform_radius = CalculateMeanWidth(widths_) * 0.5f;
     spec.control_points = PackControlPoints(
         points_, [&](size_t /*i*/) { return uniform_radius; });
   }
diff --git a/usd_mitsuba/translator.py b/usd_mitsuba/translator.py
index 263c6e2..6d89095 100644
--- a/usd_mitsuba/translator.py
+++ b/usd_mitsuba/translator.py
@@ -121,19 +121,19 @@ def _convert_curves(
     time: Usd.TimeCode = Usd.TimeCode.Default(),
 ) -> mi.Object:
   """Handles a curves prim and returns the Mitsuba curve object."""
-  curve_prim = UsdGeom.BasisCurves(prim)
+  curve_prim = UsdGeom.Curves(prim)
   curve_points = np.array(curve_prim.GetPointsAttr().Get(time))
   bsdf, _, _ = material.convert_material(prim)
   widths = curve_prim.GetWidthsAttr().Get(time)
   if widths is not None:
     widths = np.array(widths)
     if widths.ndim == 0 or widths.size == 1:
-      radius = np.full((curve_points.shape[0], 1), widths.item())
+      radius = np.full((curve_points.shape[0], 1), widths.item() * 0.5)
     elif widths.size == curve_points.shape[0]:
-      radius = widths.reshape(-1, 1)
+      radius = widths.reshape(-1, 1) * 0.5
     else:
       # Fallback to mean for other interpolations (e.g., uniform per curve)
-      radius = np.full((curve_points.shape[0], 1), np.mean(widths))
+      radius = np.full((curve_points.shape[0], 1), np.mean(widths) * 0.5)
   else:
     radius = np.full((curve_points.shape[0], 1), 0.01)
   curve_points = np.hstack([curve_points, radius])
@@ -143,6 +143,14 @@ def _convert_curves(
 
   # TODO: Correctly parse this from the USD prim.
   curve_type = 'linearcurve'
+  if (
+      hasattr(curve_prim, 'GetTypeAttr')
+      and curve_prim.GetTypeAttr().Get(time) == 'cubic'
+      and curve_prim.GetBasisAttr().Get(time) == 'bspline'
+  ):
+    curve_type = 'bsplinecurve'
+  elif prim.IsA(UsdGeom.NurbsCurves):
+    curve_type = 'bsplinecurve'
   curve_obj = _create_empty_mitsuba_curve(curve_type, bsdf)
   degree = 3 if curve_type == 'bsplinecurve' else 1
   params = mi.traverse(curve_obj)
@@ -272,6 +280,6 @@ def convert_to_mitsuba(
         UsdLux.BoundableLightBase
     ):
       mi_scene_dict[mi_id] = light.convert_light(prim, time)
-    elif prim.IsA(UsdGeom.BasisCurves):
+    elif prim.IsA(UsdGeom.Curves):
       mi_scene_dict[mi_id] = _convert_curves(prim, time)
   return mi_scene_dict