diff --git a/modules/mono/editor/bindings_generator.cpp b/modules/mono/editor/bindings_generator.cpp
index a569dfc207..b1875aec3f 100644
--- a/modules/mono/editor/bindings_generator.cpp
+++ b/modules/mono/editor/bindings_generator.cpp
@@ -3036,9 +3036,9 @@ bool BindingsGenerator::_arg_default_value_from_variant(const Variant &p_val, Ar
 			}
 			break;
 		case Variant::FLOAT:
-#ifndef REAL_T_IS_DOUBLE
-			r_iarg.default_argument += "f";
-#endif
+			if (r_iarg.type.cname == name_cache.type_float) {
+				r_iarg.default_argument += "f";
+			}
 			break;
 		case Variant::STRING:
 		case Variant::STRING_NAME:
@@ -3051,23 +3051,32 @@ bool BindingsGenerator::_arg_default_value_from_variant(const Variant &p_val, Ar
 				r_iarg.default_argument = "\"" + r_iarg.default_argument + "\"";
 			}
 			break;
-		case Variant::TRANSFORM:
-			if (p_val.operator Transform() == Transform()) {
-				r_iarg.default_argument.clear();
-			}
-			r_iarg.default_argument = "new %s(" + r_iarg.default_argument + ")";
+		case Variant::PLANE: {
+			Plane plane = p_val.operator Plane();
+			r_iarg.default_argument = "new Plane(new Vector3(" + plane.normal.operator String() + "), " + rtos(plane.d) + ")";
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
-			break;
-		case Variant::PLANE:
-		case Variant::AABB:
+		} break;
+		case Variant::AABB: {
+			AABB aabb = p_val.operator ::AABB();
+			r_iarg.default_argument = "new AABB(new Vector3(" + aabb.position.operator String() + "), new Vector3(" + aabb.position.operator String() + "))";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
+		case Variant::RECT2: {
+			Rect2 rect = p_val.operator Rect2();
+			r_iarg.default_argument = "new Rect2(new Vector2(" + rect.position.operator String() + "), new Vector2(" + rect.position.operator String() + "))";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
+		case Variant::RECT2I: {
+			Rect2i rect = p_val.operator Rect2i();
+			r_iarg.default_argument = "new Rect2i(new Vector2i(" + rect.position.operator String() + "), new Vector2i(" + rect.position.operator String() + "))";
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
 		case Variant::COLOR:
-			r_iarg.default_argument = "new Color(1, 1, 1, 1)";
+			r_iarg.default_argument = "new %s(" + r_iarg.default_argument + ")";
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
 			break;
 		case Variant::VECTOR2:
 		case Variant::VECTOR2I:
-		case Variant::RECT2:
-		case Variant::RECT2I:
 		case Variant::VECTOR3:
 		case Variant::VECTOR3I:
 			r_iarg.default_argument = "new %s" + r_iarg.default_argument;
@@ -3105,12 +3114,43 @@ bool BindingsGenerator::_arg_default_value_from_variant(const Variant &p_val, Ar
 			r_iarg.default_argument = "new %s {}";
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_REF;
 			break;
-		case Variant::TRANSFORM2D:
-		case Variant::BASIS:
-		case Variant::QUAT:
-			r_iarg.default_argument = Variant::get_type_name(p_val.get_type()) + ".Identity";
+		case Variant::TRANSFORM2D: {
+			Transform2D transform = p_val.operator Transform2D();
+			if (transform == Transform2D()) {
+				r_iarg.default_argument = "Transform2D.Identity";
+			} else {
+				r_iarg.default_argument = "new Transform2D(new Vector2" + transform.elements[0].operator String() + ", new Vector2" + transform.elements[1].operator String() + ", new Vector2" + transform.elements[2].operator String() + ")";
+			}
 			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
-			break;
+		} break;
+		case Variant::TRANSFORM: {
+			Transform transform = p_val.operator Transform();
+			if (transform == Transform()) {
+				r_iarg.default_argument = "Transform.Identity";
+			} else {
+				Basis basis = transform.basis;
+				r_iarg.default_argument = "new Transform(new Vector3" + basis.get_column(0).operator String() + ", new Vector3" + basis.get_column(1).operator String() + ", new Vector3" + basis.get_column(2).operator String() + ", new Vector3" + transform.origin.operator String() + ")";
+			}
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
+		case Variant::BASIS: {
+			Basis basis = p_val.operator Basis();
+			if (basis == Basis()) {
+				r_iarg.default_argument = "Basis.Identity";
+			} else {
+				r_iarg.default_argument = "new Basis(new Vector3" + basis.get_column(0).operator String() + ", new Vector3" + basis.get_column(1).operator String() + ", new Vector3" + basis.get_column(2).operator String() + ")";
+			}
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
+		case Variant::QUAT: {
+			Quat quat = p_val.operator Quat();
+			if (quat == Quat()) {
+				r_iarg.default_argument = "Quat.Identity";
+			} else {
+				r_iarg.default_argument = "new Quat" + quat.operator String();
+			}
+			r_iarg.def_param_mode = ArgumentInterface::NULLABLE_VAL;
+		} break;
 		case Variant::CALLABLE:
 		case Variant::SIGNAL:
 			CRASH_NOW_MSG("Parameter of type '" + String(r_iarg.type.cname) + "' cannot have a default value.");