diff --git a/ai_001_009/background_mesh/1.obj b/ai_001_009/background_mesh/1.obj
new file mode 100644
index 0000000000000000000000000000000000000000..748292188106d9fe8b3dd8e728b967fa571a17fc
--- /dev/null
+++ b/ai_001_009/background_mesh/1.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.00155306 6.12353992 -0.00086448
+v -2.22207594 6.11433601 -0.00089653
+v -2.22207499 -3.07353973 -0.00091498
+v 7.00152588 -3.07354021 -0.00088295
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99899918
+vt 0.99999988 0.00000005
+vt 0.00000295 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/10.obj b/ai_001_009/background_mesh/10.obj
new file mode 100644
index 0000000000000000000000000000000000000000..65b9074c7d3966e5baa998e88f3e9dc7930c8ca4
--- /dev/null
+++ b/ai_001_009/background_mesh/10.obj
@@ -0,0 +1,31 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.01208019 6.63305187 -0.96762323
+v 7.00151539 6.63305426 -2.47237968
+v 2.30043292 6.63350630 -2.47237968
+v 2.30043387 6.63350487 -0.95762026
+v 6.16268301 6.63313532 -2.37328339
+v 6.87051439 6.63306761 -2.37328339
+v 6.87051439 6.63306618 -1.08502996
+v 2.41117620 6.63349485 -1.08502996
+v 2.41117620 6.63349628 -2.37328339
+vt 0.00660367 1.00000000
+vt 1.00000000 0.99775773
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00000020
+vt 0.93457949 0.81972396
+vt 0.93457949 0.96995419
+vt 0.08411217 0.96995419
+vt 0.08411217 0.02350415
+vt 0.93457949 0.02350415
+f 4/4 7/7 8/8
+f 7/7 4/4 1/1
+f 2/2 7/7 1/1
+f 3/3 4/4 8/8
+f 7/7 2/2 6/6
+f 3/3 8/8 9/9
+f 5/5 6/6 2/2
+f 5/5 3/3 9/9
+f 3/3 5/5 2/2
+
diff --git a/ai_001_009/background_mesh/11.obj b/ai_001_009/background_mesh/11.obj
new file mode 100644
index 0000000000000000000000000000000000000000..f25b4674e02867d7d96878a47f3b64e8f790fa8a
--- /dev/null
+++ b/ai_001_009/background_mesh/11.obj
@@ -0,0 +1,68 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 5.68380642 8.94892979 -0.05117117
+v 5.72118664 8.94893360 -0.09189683
+v 5.72119331 8.94893456 -0.26144668
+v 5.68380642 8.94893265 -0.30315262
+v 5.72119665 8.94893551 -0.34622163
+v 5.72122002 8.94894123 -0.92551714
+v 5.68380547 8.94893837 -0.96770221
+v 5.72122383 8.94894123 -1.01029205
+v 5.72123241 8.94894314 -1.22222948
+v 1.62873769 8.94871140 -1.22223103
+v 1.62873769 8.94870758 -0.77009791
+v 1.58635020 8.94870472 -0.72771043
+v 1.58635020 8.94870853 -1.22223103
+v 1.40267110 8.94869804 -1.22223103
+v 1.40267110 8.94869423 -0.72771043
+v 1.36028361 8.94869232 -0.72771043
+v 1.36028361 8.94869614 -1.22223103
+v -1.50793576 8.94853401 -1.22223103
+v -1.50793600 8.94852352 -0.05118745
+v 2.26454973 8.94873619 -0.05117891
+v 2.30047417 8.94874001 -0.07776916
+v 2.33519554 8.94874096 -0.05117875
+vt 0.00000000 0.99482292
+vt 0.03477674 0.99999368
+vt 0.17955999 0.99999458
+vt 0.21517384 0.99482292
+vt 0.25195163 0.99999505
+vt 0.74662793 0.99999827
+vt 0.78265089 0.99482280
+vt 0.81901950 0.99999881
+vt 0.99999869 1.00000000
+vt 1.00000000 0.43389136
+vt 0.61391115 0.43389136
+vt 0.57771534 0.42802796
+vt 1.00000000 0.42802796
+vt 1.00000000 0.40261990
+vt 0.57771534 0.40261990
+vt 0.57771534 0.39675650
+vt 1.00000000 0.39675650
+vt 1.00000000 0.00000000
+vt 0.00001390 0.00000000
+vt 0.00000662 0.52184230
+vt 0.02271274 0.52681166
+vt 0.00000646 0.53161460
+f 1/1 2/2 3/3
+f 7/7 5/5 6/6
+f 7/7 8/8 9/9
+f 21/21 10/10 11/11
+f 12/12 13/13 14/14
+f 16/16 17/17 18/18
+f 16/16 19/19 20/20
+f 4/4 22/22 1/1
+f 1/1 3/3 4/4
+f 5/5 7/7 4/4
+f 22/22 10/10 21/21
+f 12/12 14/14 15/15
+f 19/19 16/16 18/18
+f 7/7 22/22 4/4
+f 10/10 22/22 9/9
+f 15/15 16/16 20/20
+f 9/9 22/22 7/7
+f 12/12 15/15 20/20
+f 20/20 21/21 11/11
+f 11/11 12/12 20/20
+
diff --git a/ai_001_009/background_mesh/12.obj b/ai_001_009/background_mesh/12.obj
new file mode 100644
index 0000000000000000000000000000000000000000..0fd2d3544f7a91c640d37048544a2a0e71196b07
--- /dev/null
+++ b/ai_001_009/background_mesh/12.obj
@@ -0,0 +1,207 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.18488550 8.85091496 -0.05116462
+v 7.18488503 8.85089588 -1.29209304
+v -3.63907075 8.84842491 -1.29209304
+v -3.63907099 8.84844303 -0.05118905
+v 4.09232521 8.85020828 -0.05117160
+v 4.09232521 8.85020733 -0.17139532
+v 4.12069798 8.85021114 -0.30315825
+v 4.14906979 8.85021782 -0.30315813
+v 4.16325569 8.85021877 -0.45511627
+v 3.11348820 8.84997845 -0.45511627
+v 3.11348820 8.84997463 -0.69627911
+v 2.81558132 8.84990692 -0.69627911
+v 2.81558132 8.84990597 -0.73883724
+v 2.73046494 8.84988689 -0.75302327
+v 2.54604626 8.84984493 -0.72465116
+v 2.30047202 8.84978962 -0.73883724
+v 2.30047202 8.84979057 -0.71046513
+v 2.24813938 8.84977722 -0.71046513
+v 2.24813938 8.84977627 -0.73883724
+v 2.02116251 8.84972477 -0.73883724
+v 2.00697660 8.84972191 -0.71046513
+v 1.99279046 8.84971809 -0.73883724
+v 1.90767407 8.84969902 -0.73883724
+v 1.89348817 8.84969616 -0.69627911
+v 1.85092998 8.84968662 -0.69627911
+v 1.85092998 8.84968567 -0.73883724
+v 1.62395310 8.84963417 -0.73883724
+v 1.59558105 8.84962845 -0.69627911
+v 1.58139515 8.84961605 -1.24953496
+v 3.24116278 8.84999561 -1.26372099
+v 5.72123432 8.85056305 -1.24953508
+v 5.73790789 8.85058403 -0.05116789
+v 0.38976711 8.84935188 -0.73883724
+v 1.28348804 8.84955597 -0.73883724
+v 1.28348804 8.84955692 -0.69627911
+v 1.36860442 8.84957695 -0.69627911
+v 1.39697647 8.84958267 -0.72465116
+v 1.38279033 8.84957123 -1.24953496
+v -1.56790805 8.84889793 -1.23534894
+v -1.56790805 8.84890556 -0.73883724
+v -0.81604719 8.84907722 -0.73883724
+v -0.81604719 8.84907818 -0.71046513
+v -0.75930274 8.84909058 -0.71046513
+v -0.74511683 8.84909248 -0.73883724
+v -0.68837273 8.84910583 -0.73883724
+v -0.68837273 8.84910679 -0.71046513
+v -0.61744273 8.84912300 -0.71046513
+v -0.61744273 8.84912205 -0.73883724
+v -2.29139638 8.84874058 -0.72465116
+v -2.27721000 8.84873581 -1.24953496
+v -2.36402130 8.84871769 -1.24953389
+v -2.36398530 8.84872532 -0.73883414
+v -2.66023374 8.84865379 -0.88069773
+v -2.66023374 8.84864998 -1.15023255
+v -2.76791215 8.84862518 -1.16441607
+v -2.76788211 8.84863186 -0.73883468
+v -2.67441964 8.84865284 -0.73883724
+v -3.05744243 8.84856606 -0.72465116
+v -3.05744243 8.84856033 -1.07930231
+v -3.17173576 8.84853458 -1.06511521
+v -3.17171192 8.84853935 -0.72464913
+v -3.57554555 8.84844780 -0.73883373
+v -3.45465207 8.84847450 -0.73883724
+v -3.45465231 8.84847164 -0.96743155
+v -3.57556057 8.84844494 -0.95162749
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99999994
+vt 1.00000000 0.00000004
+vt 0.00001969 0.00000000
+vt 0.00000562 0.71428555
+vt 0.09688768 0.71428555
+vt 0.20306863 0.71690685
+vt 0.20306852 0.71952808
+vt 0.32552373 0.72083867
+vt 0.32552373 0.62385315
+vt 0.51986438 0.62385315
+vt 0.51986438 0.59633023
+vt 0.55415976 0.59633023
+vt 0.56559157 0.58846653
+vt 0.54272795 0.57142848
+vt 0.55415976 0.54874045
+vt 0.53129619 0.54874045
+vt 0.53129619 0.54390556
+vt 0.55415976 0.54390556
+vt 0.55415976 0.52293575
+vt 0.53129619 0.52162510
+vt 0.55415976 0.52031446
+vt 0.55415976 0.51245075
+vt 0.51986438 0.51114017
+vt 0.51986438 0.50720829
+vt 0.55415976 0.50720829
+vt 0.55415976 0.48623845
+vt 0.51986438 0.48361725
+vt 0.96570468 0.48230666
+vt 0.97713643 0.63564867
+vt 0.96570474 0.86477667
+vt 0.00000264 0.86631715
+vt 0.55415976 0.37221488
+vt 0.55415976 0.45478368
+vt 0.51986438 0.45478368
+vt 0.51986438 0.46264738
+vt 0.54272795 0.46526864
+vt 0.96570468 0.46395800
+vt 0.95427287 0.19134989
+vt 0.55415976 0.19134989
+vt 0.55415976 0.26081255
+vt 0.53129619 0.26081255
+vt 0.53129619 0.26605505
+vt 0.55415976 0.26736563
+vt 0.55415976 0.27260810
+vt 0.53129619 0.27260810
+vt 0.53129619 0.27916116
+vt 0.55415976 0.27916116
+vt 0.54272795 0.12450849
+vt 0.96570468 0.12581913
+vt 0.96570379 0.11779884
+vt 0.55415726 0.11780217
+vt 0.66847783 0.09043247
+vt 0.88568199 0.09043247
+vt 0.89711171 0.08048432
+vt 0.55415773 0.08048709
+vt 0.55415976 0.08912187
+vt 0.54272795 0.05373530
+vt 0.82852298 0.05373530
+vt 0.81709033 0.04317600
+vt 0.54272634 0.04317820
+vt 0.55415696 0.00586899
+vt 0.55415976 0.01703805
+vt 0.73837209 0.01703801
+vt 0.72563642 0.00586758
+f 10/10 5/5 6/6
+f 7/7 8/8 9/9
+f 10/10 11/11 12/12
+f 35/35 34/34 33/33
+f 33/33 48/48 47/47
+f 46/46 45/45 44/44
+f 4/4 63/63 62/62
+f 57/57 49/49 52/52
+f 4/4 56/56 58/58
+f 4/4 58/58 61/61
+f 42/42 41/41 40/40
+f 5/5 36/36 35/35
+f 12/12 13/13 14/14
+f 15/15 16/16 17/17
+f 18/18 19/19 20/20
+f 24/24 22/22 23/23
+f 25/25 26/26 27/27
+f 31/31 32/32 1/1
+f 10/10 6/6 7/7
+f 7/7 9/9 10/10
+f 15/15 10/10 12/12
+f 4/4 33/33 47/47
+f 46/46 44/44 43/43
+f 64/64 63/63 61/61
+f 56/56 4/4 57/57
+f 53/53 57/57 52/52
+f 57/57 4/4 49/49
+f 12/12 14/14 15/15
+f 18/18 20/20 21/21
+f 22/22 24/24 21/21
+f 25/25 27/27 28/28
+f 31/31 1/1 2/2
+f 28/28 5/5 10/10
+f 5/5 33/33 4/4
+f 64/64 61/61 60/60
+f 59/59 58/58 56/56
+f 51/51 53/53 52/52
+f 4/4 40/40 49/49
+f 10/10 15/15 17/17
+f 18/18 21/21 24/24
+f 30/30 31/31 2/2
+f 33/33 5/5 35/35
+f 3/3 64/64 60/60
+f 59/59 56/56 55/55
+f 53/53 51/51 54/54
+f 50/50 49/49 40/40
+f 10/10 18/18 24/24
+f 30/30 2/2 3/3
+f 4/4 47/47 46/46
+f 3/3 59/59 55/55
+f 55/55 54/54 51/51
+f 50/50 40/40 39/39
+f 18/18 10/10 17/17
+f 38/38 30/30 3/3
+f 4/4 46/46 43/43
+f 50/50 39/39 38/38
+f 10/10 24/24 25/25
+f 4/4 43/43 42/42
+f 10/10 25/25 28/28
+f 40/40 4/4 42/42
+f 5/5 28/28 36/36
+f 63/63 4/4 61/61
+f 37/37 36/36 28/28
+f 3/3 4/4 62/62
+f 29/29 37/37 28/28
+f 3/3 62/62 65/65
+f 37/37 29/29 38/38
+f 64/64 3/3 65/65
+f 30/30 38/38 29/29
+f 59/59 3/3 60/60
+f 50/50 38/38 3/3
+f 3/3 55/55 51/51
+f 51/51 50/50 3/3
+
diff --git a/ai_001_009/background_mesh/13.obj b/ai_001_009/background_mesh/13.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9b90fc69674a3c5188d7d7fe46424311378b6388
--- /dev/null
+++ b/ai_001_009/background_mesh/13.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 1.56792927 6.49915934 -2.99549460
+v 7.01207161 6.49863577 -2.99557137
+v 7.00149155 1.24484348 -2.99538040
+v 1.56792974 1.24484348 -2.99530363
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99990034
+vt 0.99805659 0.00000000
+vt 0.00000009 0.00000000
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/14.obj b/ai_001_009/background_mesh/14.obj
new file mode 100644
index 0000000000000000000000000000000000000000..aef702610579b3324e0969f9e74139da6bf09f61
--- /dev/null
+++ b/ai_001_009/background_mesh/14.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -2.76787877 9.08209229 -0.70512313
+v -2.76790977 9.08209229 -1.14487696
+v -2.76791072 8.84862614 -1.14487708
+v -2.76787972 8.84863281 -0.70512235
+vt 0.00000176 1.00000000
+vt 0.99999970 1.00000000
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00002859
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/15.obj b/ai_001_009/background_mesh/15.obj
new file mode 100644
index 0000000000000000000000000000000000000000..133fbeebf43923eb6c7299e3686941347acfade0
--- /dev/null
+++ b/ai_001_009/background_mesh/15.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.17170954 9.07478237 -0.70782566
+v -3.17173386 9.07478237 -1.05217409
+v -3.17173505 8.84853458 -1.05217409
+v -3.17171073 8.84854031 -0.70782506
+vt 0.00000173 1.00000000
+vt 1.00000000 1.00000000
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00002529
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/16.obj b/ai_001_009/background_mesh/16.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9bdd68d7da80b68a1b9f2488f420e1a565cf456a
--- /dev/null
+++ b/ai_001_009/background_mesh/16.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.57554293 9.07851124 -0.70794094
+v -3.57556081 9.07851124 -0.96743971
+v -3.57556129 8.84844494 -0.96205908
+v -3.57554340 8.84844875 -0.70794022
+vt 0.00000276 1.00000000
+vt 1.00000000 1.00000000
+vt 0.97926533 0.00000000
+vt 0.00000000 0.00001658
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/17.obj b/ai_001_009/background_mesh/17.obj
new file mode 100644
index 0000000000000000000000000000000000000000..e80473f8e70135a22fd3216ca010465053ed495e
--- /dev/null
+++ b/ai_001_009/background_mesh/17.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -2.36398172 9.07218838 -0.70402038
+v -2.36401939 9.07218838 -1.23597956
+v -2.36402035 8.84871769 -1.23597968
+v -2.36398268 8.84872627 -0.70401984
+vt 0.00000101 1.00000000
+vt 0.99999976 1.00000000
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00003841
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/18.obj b/ai_001_009/background_mesh/18.obj
new file mode 100644
index 0000000000000000000000000000000000000000..57d70d680704ee819a42cebca04bb7d0af7a8c03
--- /dev/null
+++ b/ai_001_009/background_mesh/18.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 4.15371943 8.73006630 -1.28880167
+v 4.15371943 8.73006439 -1.34533060
+v -1.35785186 8.73004436 -1.34533060
+v -1.35785186 8.73004627 -1.28880167
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00000000
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/19.obj b/ai_001_009/background_mesh/19.obj
new file mode 100644
index 0000000000000000000000000000000000000000..cca2d77ee366a8767e415193c35f72cc97aae7cc
--- /dev/null
+++ b/ai_001_009/background_mesh/19.obj
@@ -0,0 +1,23 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 6.94608021 -1.40556407 -0.00087979
+v 6.94608021 -1.40557396 -0.30316904
+v 6.68364000 -1.40560818 -0.29800007
+v 6.68364429 -1.40559912 -0.01799981
+v 6.80607986 -1.40558243 -0.00088028
+v 6.82008028 -1.40558231 -0.05083583
+v 6.82008028 -1.40558064 -0.00088023
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 0.98290056 0.00000000
+vt 0.05663456 0.00001635
+vt 0.00000160 0.46654385
+vt 0.16525905 0.51989090
+vt 0.00000143 0.51989090
+f 6/6 2/2 3/3
+f 6/6 4/4 5/5
+f 6/6 7/7 1/1
+f 4/4 6/6 3/3
+f 2/2 6/6 1/1
+
diff --git a/ai_001_009/background_mesh/2.obj b/ai_001_009/background_mesh/2.obj
new file mode 100644
index 0000000000000000000000000000000000000000..d6c71f9849f6588611b0f81536948511ba918b1d
--- /dev/null
+++ b/ai_001_009/background_mesh/2.obj
@@ -0,0 +1,1057 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 5.63135147 4.82981300 -2.64373326
+v 5.60305500 4.85810947 -2.64373326
+v 5.64549923 4.85810947 -2.64373326
+v 5.72133446 4.80151701 -2.64373302
+v 5.65964794 4.82981300 -2.64373326
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diff --git a/ai_001_009/background_mesh/20.obj b/ai_001_009/background_mesh/20.obj
new file mode 100644
index 0000000000000000000000000000000000000000..d107d47e04940d512e9b756f15d543e3faad844c
--- /dev/null
+++ b/ai_001_009/background_mesh/20.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_009/background_mesh/21.obj b/ai_001_009/background_mesh/21.obj
new file mode 100644
index 0000000000000000000000000000000000000000..11980b8fc50a6abffe8fdec766484cf6d795c97b
--- /dev/null
+++ b/ai_001_009/background_mesh/21.obj
@@ -0,0 +1,203 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
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diff --git a/ai_001_009/background_mesh/22.obj b/ai_001_009/background_mesh/22.obj
new file mode 100644
index 0000000000000000000000000000000000000000..c769dc7fa58b75a33a5e8021e6d3f52e66c4c897
--- /dev/null
+++ b/ai_001_009/background_mesh/22.obj
@@ -0,0 +1,221 @@
+# https://github.com/mikedh/trimesh
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+usemtl material_0
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+f 31/31 52/52 24/24
+f 77/77 22/22 12/12
+f 76/76 24/24 26/26
+f 13/13 77/77 12/12
+f 26/26 24/24 25/25
+f 25/25 77/77 75/75
+f 75/75 26/26 25/25
+f 39/39 38/38 37/37
+f 48/48 40/40 41/41
+f 40/40 48/48 47/47
+f 44/44 40/40 47/47
+f 42/42 48/48 41/41
+f 46/46 44/44 47/47
+f 48/48 42/42 45/45
+f 44/44 46/46 43/43
+f 43/43 45/45 42/42
+f 45/45 43/43 46/46
+f 56/56 54/54 55/55
+f 54/54 56/56 53/53
+f 57/57 58/58 59/59
+f 60/60 61/61 62/62
+f 62/62 63/63 60/60
+f 64/64 65/65 66/66
+f 66/66 67/67 64/64
+f 68/68 69/69 70/70
+f 71/71 72/72 73/73
+
diff --git a/ai_001_009/background_mesh/23.obj b/ai_001_009/background_mesh/23.obj
new file mode 100644
index 0000000000000000000000000000000000000000..330e3f504126f086530f2fc869ffb76d29cca3d5
--- /dev/null
+++ b/ai_001_009/background_mesh/23.obj
@@ -0,0 +1,56 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.09692192 6.73206902 -0.96763074
+v 7.05580521 6.70245361 -0.96762806
+v 7.00153971 6.73206902 -0.96762800
+v 6.97097778 6.70245695 -0.96762562
+v 6.71649504 6.70246649 -0.96761823
+v 6.68365383 6.73206902 -0.96761876
+v 6.64580536 6.70246935 -0.96761614
+v 5.75511599 6.70250273 -0.96759027
+v 5.72124577 6.73206949 -0.96759075
+v 5.68442631 6.70250559 -0.96758819
+v 2.33373642 6.70263195 -0.96749085
+v 2.30043554 6.73206949 -0.96749139
+v 2.26304698 6.70263481 -0.96748877
+v 0.52408171 6.70270061 -0.96743822
+v 0.52407789 6.49925709 -0.96742791
+v 7.00153875 6.49172401 -0.96761578
+v 7.00151873 -0.25206852 -0.96727347
+v 7.09690094 -0.25206852 -0.96727622
+vt 0.00000000 0.99999994
+vt 0.00625554 0.99575955
+vt 0.01451156 0.99999994
+vt 0.01916129 0.99576002
+vt 0.05787858 0.99576139
+vt 0.06287508 0.99999994
+vt 0.06863339 0.99576181
+vt 0.20414388 0.99576658
+vt 0.20929694 1.00000000
+vt 0.21489869 0.99576700
+vt 0.72467649 0.99578506
+vt 0.72974294 1.00000000
+vt 0.73543119 0.99578547
+vt 0.99999940 0.99579489
+vt 1.00000000 0.96666557
+vt 0.01451170 0.96558696
+vt 0.01451475 0.00000000
+vt 0.00000319 0.00000000
+f 2/2 3/3 4/4
+f 5/5 6/6 7/7
+f 8/8 9/9 10/10
+f 11/11 12/12 13/13
+f 13/13 14/14 15/15
+f 16/16 17/17 18/18
+f 16/16 1/1 2/2
+f 16/16 4/4 5/5
+f 10/10 16/16 8/8
+f 16/16 11/11 15/15
+f 11/11 13/13 15/15
+f 1/1 16/16 18/18
+f 8/8 16/16 7/7
+f 11/11 16/16 10/10
+f 4/4 16/16 2/2
+f 7/7 16/16 5/5
+
diff --git a/ai_001_009/background_mesh/24.obj b/ai_001_009/background_mesh/24.obj
new file mode 100644
index 0000000000000000000000000000000000000000..c6ed4b2ea5dde8e01a4b5ed7a4128e40d84d343c
--- /dev/null
+++ b/ai_001_009/background_mesh/24.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.39433384 6.70262957 -0.96749258
+v 2.39433336 6.70259523 -2.46499777
+v 2.29566669 6.70259905 -2.46499491
+v 2.30043483 6.70263290 -0.98204756
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99999517
+vt 0.99999809 0.00000000
+vt 0.00971948 0.04832544
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/25.obj b/ai_001_009/background_mesh/25.obj
new file mode 100644
index 0000000000000000000000000000000000000000..e3f28bc56fc2c3731c1d80f48edb1e5bd5501e00
--- /dev/null
+++ b/ai_001_009/background_mesh/25.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 5.72118425 9.01261711 -0.05117313
+v 4.19794369 9.01261711 -0.05117659
+v 4.19794559 8.85023212 -0.05117136
+v 5.70794630 8.85057735 -0.05116795
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 0.99999875 0.00000000
+vt 0.00869065 0.00212600
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/3.obj b/ai_001_009/background_mesh/3.obj
new file mode 100644
index 0000000000000000000000000000000000000000..865b46e0afc1dbe80a95c642951bc8ce58b084f0
--- /dev/null
+++ b/ai_001_009/background_mesh/3.obj
@@ -0,0 +1,51 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.00150728 6.63305521 -3.00208521
+v 7.00153875 6.63305283 -1.00402844
+v 7.00153923 6.60175276 -0.96762139
+v 7.00153923 6.63305283 -0.96151656
+v 7.00155449 6.63009405 -0.00086346
+v 7.00152588 -3.02009439 -0.00088284
+v 7.00147915 -3.00549698 -3.00208521
+v 7.00151014 4.63203764 -2.46502662
+v 7.00151539 6.48838806 -2.46512079
+v 7.00153875 6.48838854 -0.96761560
+v 7.00151539 -1.41881549 -0.96721429
+v 7.00149202 -1.41881549 -2.46471953
+v 7.00153351 3.37085295 -0.72061610
+v 7.00153351 3.38502312 -0.70644552
+v 7.00153351 3.35668230 -0.70644552
+vt 0.00000000 1.00000000
+vt 0.66574782 0.99999970
+vt 0.67787856 0.99675727
+vt 0.67991269 0.99999970
+vt 1.00000000 0.99969321
+vt 0.99999356 0.00000000
+vt 0.00000000 0.00151214
+vt 0.17894666 0.79270834
+vt 0.17891528 0.98501343
+vt 0.67788047 0.98501354
+vt 0.67801416 0.16588148
+vt 0.17904899 0.16588148
+vt 0.76018012 0.66205823
+vt 0.76490176 0.66352612
+vt 0.76490176 0.66059029
+f 1/1 9/9 8/8
+f 2/2 9/9 1/1
+f 10/10 2/2 3/3
+f 10/10 4/4 5/5
+f 10/10 14/14 13/13
+f 15/15 5/5 6/6
+f 7/7 1/1 8/8
+f 2/2 10/10 9/9
+f 10/10 5/5 14/14
+f 7/7 8/8 12/12
+f 4/4 10/10 3/3
+f 5/5 15/15 14/14
+f 11/11 7/7 12/12
+f 11/11 10/10 13/13
+f 11/11 15/15 6/6
+f 7/7 11/11 6/6
+f 15/15 11/11 13/13
+
diff --git a/ai_001_009/background_mesh/4.obj b/ai_001_009/background_mesh/4.obj
new file mode 100644
index 0000000000000000000000000000000000000000..a1e5080b18c80d283bc7cb927034567c092ce65c
--- /dev/null
+++ b/ai_001_009/background_mesh/4.obj
@@ -0,0 +1,194 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.09693146 6.49862480 -0.29792082
+v 7.09688902 6.49862766 -3.00207901
+v -2.45829010 6.49954653 -2.99543762
+v -2.45828962 6.49954462 -1.17571044
+v -2.36402488 6.49953556 -1.18987095
+v -2.36401200 6.49953508 -1.00581324
+v -2.26007962 6.49952555 -1.21818411
+v -2.07602620 6.49950790 -1.24649990
+v -2.04771066 6.49950504 -1.27481568
+v -1.94860578 6.49949551 -1.28897357
+v -1.83534265 6.49948502 -1.30313146
+v -1.82118440 6.49948359 -1.33144724
+v -1.72207952 6.49947405 -1.33144724
+v -1.66544747 6.49946833 -1.10492086
+v -1.63713193 6.49946594 -1.10492086
+v -1.63713193 6.49946594 -1.16155255
+v -1.66544747 6.49946833 -1.16155255
+v -1.66544747 6.49946833 -1.18986833
+v -1.63713193 6.49946594 -1.35976303
+v -1.12744761 6.49941730 -1.47302628
+v 0.62813163 6.49924850 -1.48718405
+v 0.65644741 6.49924564 -1.65707886
+v 0.68476319 6.49924278 -1.65707886
+v 0.68476319 6.49924278 -1.77034199
+v 0.71307898 6.49924040 -1.77034199
+v 0.71307898 6.49924040 -1.86944723
+v 0.74139476 6.49923801 -1.88360524
+v 0.71307898 6.49924088 -1.98271048
+v 0.74139476 6.49923801 -2.02518415
+v 0.74139476 6.49923849 -2.37913156
+v 0.71307814 6.49924088 -2.46493864
+v -0.51865840 6.49935961 -2.46490288
+v 2.30043030 6.49908781 -2.47823668
+v 7.00151491 6.49863577 -2.47823668
+v 7.00153875 6.49863434 -0.97749990
+v -2.45829058 6.49954414 -0.96734124
+v -2.45828962 6.49954319 -0.30318579
+v -0.58944750 6.49936438 -0.72265774
+v -0.57528949 6.49936295 -0.73681563
+v -0.60360527 6.49936581 -0.73681563
+v -0.90092111 6.49939394 -0.48197341
+v -0.88676333 6.49939299 -0.49613142
+v -0.91507912 6.49939585 -0.49613142
+v -1.36813188 6.49943924 -0.70849985
+v -1.31149983 6.49943399 -0.73681563
+v -1.36813188 6.49943924 -0.73681563
+v -1.33981586 6.49943733 -1.34560513
+v -1.33981466 6.49943638 -0.96737379
+v -1.42476177 6.49944448 -0.96737128
+v -1.42476296 6.49944544 -1.38807881
+v -1.33981586 6.49943733 -1.38807881
+v -1.92028928 6.49949217 -0.48197341
+v -1.86365819 6.49948692 -0.49613142
+v -1.99107957 6.49949932 -0.49613142
+v -2.27422476 6.49952650 -0.96734661
+v -2.31689119 6.49953032 -0.96734536
+v -2.03357172 6.49950314 -0.96735358
+v -1.94860458 6.49949503 -0.96735609
+v -1.72207832 6.49947309 -0.96736264
+v -1.65137529 6.49946642 -0.96736473
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99999553
+vt 0.99754399 0.00000005
+vt 0.32460734 0.00000010
+vt 0.32984391 0.00986536
+vt 0.26177922 0.00986671
+vt 0.34031412 0.02074373
+vt 0.35078534 0.04000581
+vt 0.36125654 0.04296916
+vt 0.36649212 0.05334097
+vt 0.37172773 0.06519450
+vt 0.38219893 0.06667623
+vt 0.38219893 0.07704803
+vt 0.29842928 0.08297484
+vt 0.29842928 0.08593820
+vt 0.31937173 0.08593820
+vt 0.31937173 0.08297484
+vt 0.32984293 0.08297484
+vt 0.39267012 0.08593820
+vt 0.43455496 0.13927911
+vt 0.43979055 0.32300892
+vt 0.50261778 0.32597232
+vt 0.50261778 0.32893568
+vt 0.54450256 0.32893568
+vt 0.54450256 0.33189908
+vt 0.58115178 0.33189908
+vt 0.58638740 0.33486247
+vt 0.62303662 0.33189908
+vt 0.63874340 0.33486247
+vt 0.76963341 0.33486247
+vt 0.80136502 0.33189902
+vt 0.80135185 0.20299184
+vt 0.80628264 0.49802303
+vt 0.80628264 0.99001414
+vt 0.25130892 0.99001664
+vt 0.24755223 0.00000000
+vt 0.00194700 0.00000010
+vt 0.15706807 0.19558342
+vt 0.16230367 0.19706511
+vt 0.16230367 0.19410174
+vt 0.06806280 0.16298620
+vt 0.07329845 0.16446789
+vt 0.07329845 0.16150451
+vt 0.15183246 0.11409035
+vt 0.16230367 0.12001717
+vt 0.16230367 0.11409035
+vt 0.38743454 0.11705376
+vt 0.24756427 0.11705388
+vt 0.24756335 0.10816376
+vt 0.40314132 0.10816364
+vt 0.40314132 0.11705376
+vt 0.06806280 0.05630443
+vt 0.07329845 0.06223114
+vt 0.07329845 0.04889588
+vt 0.24755421 0.01926337
+vt 0.24755375 0.01479813
+vt 0.24755679 0.04444887
+vt 0.24755771 0.05334109
+vt 0.24756014 0.07704815
+vt 0.24756092 0.08444756
+f 7/7 4/4 5/5
+f 55/55 6/6 56/56
+f 6/6 55/55 7/7
+f 7/7 8/8 9/9
+f 9/9 57/57 58/58
+f 10/10 11/11 12/12
+f 14/14 59/59 60/60
+f 14/14 15/15 16/16
+f 32/32 21/21 22/22
+f 22/22 23/23 24/24
+f 24/24 25/25 26/26
+f 26/26 27/27 28/28
+f 28/28 29/29 30/30
+f 28/28 31/31 32/32
+f 54/54 58/58 57/57
+f 37/37 56/56 36/36
+f 37/37 52/52 54/54
+f 53/53 52/52 41/41
+f 40/40 42/42 38/38
+f 43/43 45/45 44/44
+f 42/42 40/40 43/43
+f 41/41 52/52 37/37
+f 6/6 7/7 5/5
+f 9/9 58/58 10/10
+f 17/17 59/59 14/14
+f 14/14 16/16 17/17
+f 32/32 22/22 24/24
+f 24/24 26/26 28/28
+f 31/31 28/28 30/30
+f 54/54 57/57 55/55
+f 54/54 56/56 37/37
+f 53/53 41/41 43/43
+f 43/43 40/40 45/45
+f 38/38 42/42 41/41
+f 41/41 37/37 1/1
+f 4/4 7/7 3/3
+f 9/9 10/10 12/12
+f 59/59 17/17 13/13
+f 32/32 24/24 28/28
+f 58/58 54/54 53/53
+f 56/56 54/54 55/55
+f 53/53 43/43 44/44
+f 38/38 41/41 1/1
+f 3/3 7/7 9/9
+f 13/13 17/17 18/18
+f 21/21 32/32 20/20
+f 58/58 53/53 59/59
+f 60/60 53/53 44/44
+f 39/39 38/38 1/1
+f 3/3 9/9 12/12
+f 13/13 18/18 19/19
+f 3/3 20/20 32/32
+f 53/53 60/60 59/59
+f 19/19 12/12 13/13
+f 20/20 3/3 19/19
+f 60/60 44/44 46/46
+f 12/12 19/19 3/3
+f 45/45 60/60 46/46
+f 33/33 3/3 32/32
+f 40/40 60/60 45/45
+f 3/3 33/33 2/2
+f 39/39 60/60 40/40
+f 2/2 33/33 34/34
+f 60/60 39/39 35/35
+f 35/35 2/2 34/34
+f 35/35 39/39 1/1
+f 2/2 35/35 1/1
+f 47/47 51/51 50/50
+f 47/47 49/49 48/48
+f 49/49 47/47 50/50
+
diff --git a/ai_001_009/background_mesh/5.obj b/ai_001_009/background_mesh/5.obj
new file mode 100644
index 0000000000000000000000000000000000000000..6b0541c63a398fa0c098d6072ed183bc0f9e56b2
--- /dev/null
+++ b/ai_001_009/background_mesh/5.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 6.59142876 6.11348867 -0.00086592
+v 6.59142876 6.11348867 -0.30315515
+v -2.16571450 6.11433077 -0.30318555
+v -2.16571450 6.11433077 -0.00089633
+vt 0.00000000 1.00000000
+vt 0.99989945 1.00000000
+vt 1.00000000 0.00000000
+vt 0.00010060 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_009/background_mesh/6.obj b/ai_001_009/background_mesh/6.obj
new file mode 100644
index 0000000000000000000000000000000000000000..dec9709c92ea2028c5a32257952d758f470b36fd
--- /dev/null
+++ b/ai_001_009/background_mesh/6.obj
@@ -0,0 +1,23 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 6.68366241 6.11348009 -0.29785722
+v 6.68366718 6.11796284 -0.00086559
+v 6.68364477 -1.38204122 -0.00088066
+v 6.68364429 -1.40559936 -0.02642776
+v 6.68364382 -1.38204050 -0.05083689
+v 6.68364048 -1.40560734 -0.26928499
+v 6.68364000 -1.38204122 -0.30316988
+vt 0.01757386 0.99940425
+vt 1.00000000 1.00000000
+vt 0.99995023 0.00313229
+vt 0.91544223 0.00000105
+vt 0.83469874 0.00313239
+vt 0.11208867 0.00000000
+vt 0.00000000 0.00313229
+f 5/5 2/2 3/3
+f 3/3 4/4 5/5
+f 5/5 6/6 7/7
+f 2/2 5/5 1/1
+f 5/5 7/7 1/1
+
diff --git a/ai_001_009/background_mesh/7.obj b/ai_001_009/background_mesh/7.obj
new file mode 100644
index 0000000000000000000000000000000000000000..b24cbeb367acff85d78551b706b5055dd0af327a
--- /dev/null
+++ b/ai_001_009/background_mesh/7.obj
@@ -0,0 +1,48 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.09689760 6.47896290 -2.46512294
+v 7.09692097 6.47896338 -0.96761787
+v 7.09689760 -1.40557551 -0.95792466
+v 7.09687376 -1.40562487 -2.47207594
+v 7.09691095 3.81858492 -1.07113230
+v 7.09691858 6.36575508 -1.07113230
+v 7.09689856 6.36575508 -2.35886836
+v 7.09688663 2.38933945 -2.35886836
+v 7.09690666 2.38933945 -1.07113230
+v 7.09688520 1.79499972 -2.35886836
+v 7.09688616 2.16017270 -2.35886788
+v 7.09690666 2.16011453 -1.07113051
+v 7.09689617 -1.28990650 -1.07113230
+v 7.09687614 -1.27575541 -2.35886836
+vt 0.00459201 0.99999994
+vt 0.99359822 1.00000000
+vt 1.00000000 0.00000626
+vt 0.00000000 0.00000000
+vt 0.92523354 0.66258496
+vt 0.92523354 0.98564184
+vt 0.07476636 0.98564184
+vt 0.07476636 0.48131421
+vt 0.92523354 0.48131421
+vt 0.07476636 0.40593424
+vt 0.07476667 0.45224905
+vt 0.92523474 0.45224169
+vt 0.92523354 0.01467653
+vt 0.07476636 0.01647131
+f 4/4 11/11 10/10
+f 4/4 10/10 14/14
+f 8/8 4/4 1/1
+f 9/9 11/11 8/8
+f 4/4 8/8 11/11
+f 13/13 4/4 14/14
+f 11/11 9/9 12/12
+f 7/7 8/8 1/1
+f 4/4 13/13 3/3
+f 2/2 9/9 5/5
+f 2/2 7/7 1/1
+f 12/12 3/3 13/13
+f 2/2 5/5 6/6
+f 7/7 2/2 6/6
+f 9/9 3/3 12/12
+f 3/3 9/9 2/2
+
diff --git a/ai_001_009/background_mesh/8.obj b/ai_001_009/background_mesh/8.obj
new file mode 100644
index 0000000000000000000000000000000000000000..aeecb27627a3cf59aa1f646e792dc55684e441fe
--- /dev/null
+++ b/ai_001_009/background_mesh/8.obj
@@ -0,0 +1,400 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 7.01207161 6.49863243 -0.30315292
+v -2.42207265 6.49953985 -0.30318567
+v -2.42207265 -1.40680587 -0.30320156
+v -0.22972941 -1.34274960 -0.30319384
+v -0.55504489 -1.04572248 -0.30319437
+v -0.62576556 -0.93256950 -0.30319437
+v -0.65405393 -0.93256950 -0.30319446
+v -1.21981978 -0.33851528 -0.30319524
+v -1.43198180 -0.22536230 -0.30319574
+v -1.43198180 -0.12635326 -0.30319557
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