diff --git a/libsrc/meshing/basegeom.cpp b/libsrc/meshing/basegeom.cpp
index c2834d42..49731499 100644
--- a/libsrc/meshing/basegeom.cpp
+++ b/libsrc/meshing/basegeom.cpp
@@ -983,8 +983,10 @@ namespace netgen
     RegionTimer reg(timer_opt2d);
     auto meshopt = MeshOptimize2d(mesh);
     for(auto i : Range(mparam.optsteps2d))
+    for(auto k : Range(mesh.GetNFD()))
       {
         PrintMessage(3, "Optimization step ", i);
+        meshopt.SetFaceIndex(k+1);
         int innerstep = 0;
         for(auto optstep : mparam.optimize2d)
           {
diff --git a/libsrc/meshing/improve2.cpp b/libsrc/meshing/improve2.cpp
index 3b2b102d..356c08b8 100644
--- a/libsrc/meshing/improve2.cpp
+++ b/libsrc/meshing/improve2.cpp
@@ -394,6 +394,7 @@ namespace netgen
         return 0.0;
 
     double loch = mesh.GetH (mesh[pi1]);
+    int faceindex = -1;
 
     for (SurfaceElementIndex sei2 : elementsonnode[pi1])
       {
@@ -403,13 +404,8 @@ namespace netgen
 
         if (el2[0] == pi2 || el2[1] == pi2 || el2[2] == pi2)
           {
+            faceindex = el2.GetIndex();
             hasbothpi.Append (sei2);
-            nv = Cross (Vec3d (mesh[el2[0]], mesh[el2[1]]),
-                    Vec3d (mesh[el2[0]], mesh[el2[2]]));
-          }
-        else
-          {
-            hasonepi.Append (sei2);
           }
       }
 
@@ -417,7 +413,7 @@ namespace netgen
         return 0.0;
 
 
-    nv = normals[pi1];
+    nv = normals[pi2];
 
 
     for (SurfaceElementIndex sei2 :  elementsonnode[pi2])
@@ -476,7 +472,14 @@ namespace netgen
 
         for (int l = 0; l < 3; l++)
           {
-            if ( (normals[el[l]] * nv) < 0.5)
+            auto normal = normals[el[l]];
+            if(fixed[el[l]])
+            {
+                // point possibly on edge -> multiple normal vectors (for each surface), need to calculate it to be sure
+                const int surfnr = mesh.GetFaceDescriptor (el.GetIndex()).SurfNr();
+                normal = mesh.GetGeometry()->GetNormal (surfnr, mesh[el[l]], &el.GeomInfo()[l]);
+            }
+            if ( ( normal * nv) < 0.5)
                 bad2 += 1e10;
           }
 
@@ -532,10 +535,10 @@ namespace netgen
           {
             const Element2d & el1p = mesh[sei];
             if (el1p.IsDeleted()) continue;
+            if(el1p.GetIndex() != faceindex) continue;
 
             for (int l = 0; l < el1p.GetNP(); l++)
                 if (el1p[l] == pi1)
-                    // gi = el1p.GeomInfoPi (l+1);
                     gi = el1p.GeomInfo()[l];
             break;
           }
diff --git a/tests/pytest/results.json b/tests/pytest/results.json
index 5f079143..ad07fcba 100644
--- a/tests/pytest/results.json
+++ b/tests/pytest/results.json
@@ -308,18 +308,18 @@
         },
         {
             "angles_tet": [
-                3.8299,
-                169.8
+                5.6575,
+                169.44
             ],
             "angles_trig": [
-                7.7658,
-                155.67
+                7.092,
+                155.41
             ],
             "ne1d": 48,
-            "ne2d": 424,
-            "ne3d": 783,
-            "quality_histogram": "[0, 3, 5, 27, 40, 43, 49, 44, 84, 74, 78, 84, 60, 52, 48, 24, 32, 19, 15, 2]",
-            "total_badness": 1824.4335331
+            "ne2d": 428,
+            "ne3d": 763,
+            "quality_histogram": "[0, 1, 12, 30, 35, 44, 39, 49, 82, 100, 68, 81, 55, 44, 49, 23, 22, 19, 8, 2]",
+            "total_badness": 1832.2349397
         },
         {
             "angles_tet": [
@@ -462,18 +462,18 @@
     "cubeandring.geo": [
         {
             "angles_tet": [
-                5.3682,
-                166.05
+                5.2065,
+                170.27
             ],
             "angles_trig": [
-                11.3,
-                154.12
+                10.96,
+                154.62
             ],
             "ne1d": 262,
-            "ne2d": 702,
+            "ne2d": 718,
             "ne3d": 2095,
-            "quality_histogram": "[0, 0, 13, 33, 70, 93, 118, 97, 80, 55, 43, 74, 127, 207, 219, 267, 264, 192, 112, 31]",
-            "total_badness": 3914.3913191
+            "quality_histogram": "[0, 5, 18, 28, 77, 119, 118, 106, 71, 43, 54, 76, 112, 180, 220, 241, 257, 212, 126, 32]",
+            "total_badness": 4053.2056892
         },
         {
             "angles_tet": [
@@ -507,48 +507,48 @@
         },
         {
             "angles_tet": [
-                7.6936,
-                166.0
+                5.4026,
+                163.74
             ],
             "angles_trig": [
-                12.773,
-                154.12
+                13.552,
+                150.46
             ],
             "ne1d": 262,
-            "ne2d": 702,
-            "ne3d": 1978,
-            "quality_histogram": "[0, 0, 2, 10, 39, 81, 115, 92, 68, 28, 53, 54, 110, 175, 225, 265, 273, 220, 133, 35]",
-            "total_badness": 3396.7269266
+            "ne2d": 718,
+            "ne3d": 2007,
+            "quality_histogram": "[0, 2, 7, 13, 54, 100, 118, 95, 73, 35, 39, 60, 75, 170, 217, 261, 288, 221, 142, 37]",
+            "total_badness": 3584.1910073
         },
         {
             "angles_tet": [
-                21.834,
-                143.22
+                21.998,
+                144.41
             ],
             "angles_trig": [
-                23.385,
-                115.43
+                24.294,
+                115.35
             ],
             "ne1d": 378,
-            "ne2d": 1400,
-            "ne3d": 7678,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 11, 30, 118, 264, 475, 859, 1311, 1567, 1623, 1081, 337]",
-            "total_badness": 9555.5911544
+            "ne2d": 1402,
+            "ne3d": 7743,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 10, 37, 134, 295, 539, 904, 1259, 1618, 1577, 1059, 310]",
+            "total_badness": 9692.2747594
         },
         {
             "angles_tet": [
-                19.725,
-                150.28
+                23.275,
+                141.99
             ],
             "angles_trig": [
-                22.53,
-                115.61
+                23.586,
+                119.22
             ],
             "ne1d": 624,
-            "ne2d": 3922,
-            "ne3d": 37844,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 0, 2, 13, 73, 237, 689, 1700, 3616, 5845, 8140, 8772, 6595, 2161]",
-            "total_badness": 45961.097134
+            "ne2d": 3924,
+            "ne3d": 38387,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 15, 49, 235, 665, 1712, 3529, 5923, 8201, 8942, 6894, 2220]",
+            "total_badness": 46525.372783
         }
     ],
     "cubeandspheres.geo": [
@@ -565,7 +565,7 @@
             "ne2d": 148,
             "ne3d": 98,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 6, 3, 4, 18, 19, 13, 20, 2, 9, 1, 0]",
-            "total_badness": 145.83375079
+            "total_badness": 145.83362639
         },
         {
             "angles_tet": [
@@ -573,14 +573,14 @@
                 137.5
             ],
             "angles_trig": [
-                30.884,
-                106.1
+                28.935,
+                109.27
             ],
             "ne1d": 144,
-            "ne2d": 140,
-            "ne3d": 86,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 7, 5, 23, 16, 12, 16, 1, 3, 1, 0]",
-            "total_badness": 129.5899229
+            "ne2d": 150,
+            "ne3d": 100,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 7, 10, 16, 18, 15, 17, 6, 5, 4, 0]",
+            "total_badness": 146.6468601
         },
         {
             "angles_tet": [
@@ -588,14 +588,14 @@
                 137.32
             ],
             "angles_trig": [
-                30.054,
-                105.76
+                29.702,
+                106.44
             ],
             "ne1d": 144,
-            "ne2d": 142,
-            "ne3d": 89,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 6, 4, 23, 19, 9, 18, 3, 2, 2, 0]",
-            "total_badness": 134.24463081
+            "ne2d": 148,
+            "ne3d": 98,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 6, 6, 19, 21, 12, 18, 5, 4, 4, 0]",
+            "total_badness": 145.14580879
         },
         {
             "angles_tet": [
@@ -610,22 +610,22 @@
             "ne2d": 148,
             "ne3d": 98,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 3, 6, 3, 4, 18, 19, 13, 20, 2, 9, 1, 0]",
-            "total_badness": 145.83375079
+            "total_badness": 145.83362639
         },
         {
             "angles_tet": [
-                19.282,
-                139.8
+                19.289,
+                140.95
             ],
             "angles_trig": [
-                23.342,
-                126.8
+                23.326,
+                126.82
             ],
             "ne1d": 264,
-            "ne2d": 368,
-            "ne3d": 335,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 1, 1, 18, 20, 42, 50, 47, 34, 43, 43, 18, 15, 2]",
-            "total_badness": 499.78585873
+            "ne2d": 372,
+            "ne3d": 343,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 2, 4, 22, 19, 48, 45, 41, 31, 49, 48, 16, 16, 1]",
+            "total_badness": 516.68086122
         },
         {
             "angles_tet": [
@@ -676,18 +676,18 @@
         },
         {
             "angles_tet": [
-                20.408,
-                142.77
+                22.806,
+                144.27
             ],
             "angles_trig": [
-                17.345,
-                126.66
+                22.348,
+                129.8
             ],
             "ne1d": 102,
-            "ne2d": 1396,
-            "ne3d": 8210,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 3, 16, 60, 195, 429, 755, 1093, 1287, 1392, 1239, 995, 562, 184]",
-            "total_badness": 11121.187355
+            "ne2d": 1398,
+            "ne3d": 8169,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 15, 79, 187, 374, 742, 1014, 1375, 1425, 1271, 967, 547, 173]",
+            "total_badness": 11044.412549
         },
         {
             "angles_tet": [
@@ -717,7 +717,7 @@
             "ne2d": 5500,
             "ne3d": 89273,
             "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 9, 57, 256, 780, 2195, 5118, 9739, 14853, 18700, 19471, 13926, 4168]",
-            "total_badness": 109900.35464
+            "total_badness": 109900.35461
         },
         {
             "angles_tet": [
@@ -738,18 +738,18 @@
     "cubemsphere.geo": [
         {
             "angles_tet": [
-                19.119,
-                146.55
+                18.031,
+                150.15
             ],
             "angles_trig": [
-                19.026,
-                125.8
+                20.172,
+                121.7
             ],
             "ne1d": 90,
-            "ne2d": 698,
-            "ne3d": 4776,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 4, 16, 51, 98, 209, 398, 528, 705, 811, 784, 640, 411, 120]",
-            "total_badness": 6388.8286556
+            "ne2d": 700,
+            "ne3d": 4865,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 1, 1, 18, 49, 118, 206, 368, 588, 774, 856, 804, 670, 322, 90]",
+            "total_badness": 6546.4740836
         },
         {
             "angles_tet": [
@@ -783,48 +783,48 @@
         },
         {
             "angles_tet": [
-                21.744,
-                144.7
+                23.834,
+                137.35
             ],
             "angles_trig": [
-                23.409,
+                21.556,
                 120.39
             ],
             "ne1d": 90,
-            "ne2d": 698,
-            "ne3d": 4573,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 5, 11, 38, 124, 244, 437, 627, 796, 871, 807, 498, 114]",
-            "total_badness": 5883.7028961
+            "ne2d": 700,
+            "ne3d": 4703,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 13, 46, 122, 278, 477, 709, 869, 895, 725, 455, 112]",
+            "total_badness": 6099.1385475
         },
         {
             "angles_tet": [
-                22.862,
-                138.41
+                25.263,
+                143.1
             ],
             "angles_trig": [
-                23.255,
-                128.04
+                25.716,
+                119.82
             ],
             "ne1d": 146,
-            "ne2d": 1482,
-            "ne3d": 18030,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 50, 157, 444, 990, 1901, 3070, 3790, 4014, 2780, 829]",
-            "total_badness": 22163.624731
+            "ne2d": 1484,
+            "ne3d": 17773,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 5, 45, 123, 418, 950, 1910, 2957, 3877, 3832, 2764, 891]",
+            "total_badness": 21817.070558
         },
         {
             "angles_tet": [
-                24.702,
-                143.19
+                22.149,
+                145.8
             ],
             "angles_trig": [
-                25.471,
-                126.09
+                24.488,
+                127.38
             ],
             "ne1d": 248,
-            "ne2d": 4340,
-            "ne3d": 112801,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 2, 21, 120, 474, 1663, 4885, 10633, 17731, 23919, 26274, 20590, 6489]",
-            "total_badness": 136439.77655
+            "ne2d": 4342,
+            "ne3d": 113225,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 1, 6, 15, 118, 498, 1665, 4987, 10776, 18059, 24305, 26294, 20295, 6206]",
+            "total_badness": 137142.34083
         }
     ],
     "cylinder.geo": [
@@ -871,7 +871,7 @@
             "ne2d": 152,
             "ne3d": 358,
             "quality_histogram": "[0, 0, 1, 0, 0, 2, 5, 11, 21, 19, 22, 22, 31, 29, 35, 39, 57, 37, 17, 10]",
-            "total_badness": 559.67849284
+            "total_badness": 559.67848726
         },
         {
             "angles_tet": [
@@ -937,18 +937,18 @@
         },
         {
             "angles_tet": [
-                12.765,
-                164.21
+                10.144,
+                167.27
             ],
             "angles_trig": [
-                14.86,
-                145.49
+                13.416,
+                150.52
             ],
             "ne1d": 48,
-            "ne2d": 130,
-            "ne3d": 142,
-            "quality_histogram": "[0, 0, 0, 5, 9, 38, 20, 6, 0, 0, 2, 3, 0, 10, 7, 20, 17, 3, 2, 0]",
-            "total_badness": 370.48768997
+            "ne2d": 142,
+            "ne3d": 150,
+            "quality_histogram": "[0, 0, 0, 5, 27, 32, 16, 4, 0, 2, 1, 1, 4, 5, 3, 17, 16, 7, 10, 0]",
+            "total_badness": 409.78409193
         },
         {
             "angles_tet": [
@@ -1014,18 +1014,18 @@
         },
         {
             "angles_tet": [
-                5.7901,
-                170.17
+                3.7122,
+                169.11
             ],
             "angles_trig": [
-                7.4711,
-                159.43
+                6.967,
+                157.97
             ],
             "ne1d": 0,
-            "ne2d": 190,
-            "ne3d": 815,
-            "quality_histogram": "[0, 3, 30, 74, 82, 71, 72, 78, 57, 63, 56, 51, 46, 42, 25, 26, 18, 12, 6, 3]",
-            "total_badness": 2455.5742667
+            "ne2d": 188,
+            "ne3d": 796,
+            "quality_histogram": "[0, 8, 20, 33, 73, 79, 66, 73, 81, 55, 56, 53, 45, 43, 34, 28, 17, 9, 18, 5]",
+            "total_badness": 2252.448172
         },
         {
             "angles_tet": [
@@ -1059,18 +1059,18 @@
         },
         {
             "angles_tet": [
-                25.773,
-                140.19
+                19.839,
+                144.38
             ],
             "angles_trig": [
-                25.416,
-                117.5
+                24.96,
+                119.09
             ],
             "ne1d": 0,
-            "ne2d": 1616,
-            "ne3d": 5533,
-            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 0, 1, 10, 48, 135, 266, 450, 664, 886, 1061, 1008, 779, 225]",
-            "total_badness": 7010.7623078
+            "ne2d": 1618,
+            "ne3d": 5571,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 0, 2, 1, 18, 53, 134, 271, 457, 686, 910, 1031, 1029, 776, 203]",
+            "total_badness": 7082.5770045
         },
         {
             "angles_tet": [
@@ -1305,18 +1305,18 @@
         },
         {
             "angles_tet": [
-                11.341,
-                166.54
+                11.325,
+                166.0
             ],
             "angles_trig": [
-                14.821,
-                145.63
+                14.813,
+                148.63
             ],
             "ne1d": 134,
-            "ne2d": 192,
-            "ne3d": 163,
-            "quality_histogram": "[0, 0, 0, 1, 3, 23, 36, 13, 5, 21, 11, 9, 10, 11, 7, 3, 5, 3, 1, 1]",
-            "total_badness": 396.98127414
+            "ne2d": 198,
+            "ne3d": 169,
+            "quality_histogram": "[0, 0, 0, 1, 3, 43, 28, 7, 5, 21, 11, 9, 10, 11, 7, 3, 5, 3, 1, 1]",
+            "total_badness": 428.99007654
         },
         {
             "angles_tet": [
@@ -1441,143 +1441,96 @@
             "total_badness": 643.8604751
         }
     ],
-    "frame.step": [
-        {
-            "angles_tet": [
-                2.906,
-                171.1
-            ],
-            "angles_trig": [
-                3.7733,
-                169.05
-            ],
-            "ne1d": 10108,
-            "ne2d": 29958,
-            "ne3d": 152534,
-            "quality_histogram": "[0, 3, 1, 3, 6, 14, 58, 147, 466, 1206, 2715, 5679, 10184, 16198, 21769, 25949, 26794, 22865, 14592, 3885]",
-            "total_badness": 201509.42542
-        },
-        {
-            "angles_tet": [
-                2.296,
-                175.61
-            ],
-            "angles_trig": [
-                3.4731,
-                146.28
-            ],
-            "ne1d": 5988,
-            "ne2d": 10976,
-            "ne3d": 28946,
-            "quality_histogram": "[3, 4, 5, 11, 16, 45, 102, 210, 663, 980, 1507, 2531, 3080, 3906, 4321, 4193, 3360, 2375, 1322, 312]",
-            "total_badness": 42858.494901
-        },
-        {
-            "angles_tet": [
-                2.171,
-                174.11
-            ],
-            "angles_trig": [
-                1.6035,
-                150.55
-            ],
-            "ne1d": 9622,
-            "ne2d": 23596,
-            "ne3d": 80222,
-            "quality_histogram": "[2, 15, 4, 17, 17, 35, 89, 194, 426, 984, 2152, 4199, 7155, 10324, 12467, 13496, 12313, 9367, 5529, 1437]",
-            "total_badness": 110253.4299
-        }
-    ],
     "hinge.stl": [
         {
             "angles_tet": [
-                16.119,
-                155.5
+                18.84,
+                152.34
             ],
             "angles_trig": [
-                18.101,
-                139.79
+                19.944,
+                137.96
             ],
             "ne1d": 456,
-            "ne2d": 1212,
-            "ne3d": 1977,
-            "quality_histogram": "[0, 0, 0, 0, 0, 1, 3, 10, 15, 45, 78, 122, 186, 262, 287, 291, 242, 249, 142, 44]",
-            "total_badness": 2760.6220954
+            "ne2d": 1192,
+            "ne3d": 1943,
+            "quality_histogram": "[0, 0, 0, 0, 0, 0, 2, 9, 13, 47, 57, 120, 157, 259, 299, 281, 300, 232, 130, 37]",
+            "total_badness": 2691.5991941
         },
         {
             "angles_tet": [
-                7.7862,
-                161.84
+                8.596,
+                156.4
             ],
             "angles_trig": [
-                9.6143,
-                152.14
+                12.025,
+                142.42
             ],
             "ne1d": 298,
-            "ne2d": 610,
-            "ne3d": 778,
-            "quality_histogram": "[0, 0, 2, 10, 9, 8, 23, 16, 37, 43, 67, 80, 99, 93, 80, 82, 48, 50, 27, 4]",
-            "total_badness": 1361.2707696
+            "ne2d": 582,
+            "ne3d": 742,
+            "quality_histogram": "[0, 0, 1, 3, 8, 10, 19, 19, 39, 49, 61, 86, 89, 80, 66, 83, 49, 43, 31, 6]",
+            "total_badness": 1274.5534899
         },
         {
             "angles_tet": [
-                6.3759,
-                164.51
+                9.0509,
+                154.17
             ],
             "angles_trig": [
-                12.725,
-                144.55
+                12.778,
+                133.39
             ],
             "ne1d": 370,
-            "ne2d": 850,
-            "ne3d": 1132,
-            "quality_histogram": "[0, 0, 1, 1, 7, 6, 15, 29, 42, 47, 70, 110, 142, 142, 161, 144, 97, 66, 44, 8]",
-            "total_badness": 1804.9964367
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\ No newline at end of file