diff --git a/ai_002_001/background_mesh/1.obj b/ai_002_001/background_mesh/1.obj
new file mode 100644
index 0000000000000000000000000000000000000000..1fb66b13970988a9b59fbef60721c78c56283300
--- /dev/null
+++ b/ai_002_001/background_mesh/1.obj
@@ -0,0 +1,146 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.76358962 -9.78509712 -3.82900000
+v 0.76358962 -9.78509712 -3.80072594
+v 0.70896447 -9.78509521 -3.80072594
+v 0.70896447 -9.78509521 -3.77245188
+v 0.76358962 -9.78509712 -3.77245188
+v 0.76358962 -9.78509712 -3.73004103
+v 0.70896447 -9.78509521 -3.73004103
+v 0.70896447 -9.78509521 -3.70176697
+v 0.76358962 -9.78509712 -3.70176697
+v 0.76358962 -9.78509712 -3.65935612
+v 0.70896453 -9.78509521 -3.65935612
+v 0.70896453 -9.78509521 -3.61694503
+v 0.76358962 -9.78509712 -3.61694503
+v 0.76358962 -9.78509712 -3.58867121
+v 0.65858263 -9.78509331 -3.58867073
+v 0.65857613 -9.78509331 -3.82899952
+v 0.70896488 -9.78509521 -2.58494496
+v 0.70896488 -9.78509521 -2.50012302
+v 0.76358962 -9.78509712 -2.51426005
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+v 0.70896471 -9.78509521 -3.15042448
+v 0.76358962 -9.78509712 -3.15042448
+v 0.76358962 -9.78509712 -3.22110939
+v 0.70896471 -9.78509521 -3.10801363
+v 0.65859556 -9.78509331 -3.10801339
+v 0.65861005 -9.78509331 -2.57080746
+v 0.76358962 -9.78509712 -2.42943811
+v 0.76359153 -9.78509808 0.86388922
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+v -4.74983501 -9.78487206 -1.84001708
+v -5.34358788 -9.78484821 -1.84001708
+v -5.34358788 -9.78484726 -4.35206795
+v -1.03180754 -9.78502369 -4.35206795
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+v -0.89043760 -9.78502941 -3.53212309
+v -0.86216366 -9.78503036 -3.50384903
+v -0.91871166 -9.78502846 -3.50384903
+v 0.70896465 -9.78509521 -3.22110939
+vt 0.10027739 0.99999970
+vt 0.10569781 0.99999970
+vt 0.10569781 0.99105531
+vt 0.11111823 0.99105531
+vt 0.11111823 0.99999970
+vt 0.11924881 0.99999970
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+vt 0.12466924 0.99105531
+vt 0.12466924 0.99999970
+vt 0.13279982 0.99999970
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+vt 0.14093046 0.99105531
+vt 0.14093046 0.99999970
+vt 0.14635083 0.99999970
+vt 0.14635092 0.98280561
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+vt 0.35232627 0.99999970
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+vt 0.23036714 0.99105531
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+vt 0.34148556 0.98281014
+vt 0.36858749 0.99999970
+vt 0.99995148 1.00000000
+vt 0.99193394 0.99105555
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+vt 0.99995321 0.96759260
+vt 0.99999893 0.11574098
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+vt 0.36858749 0.99105537
+vt 0.15719168 0.72916651
+vt 0.16261210 0.73379606
+vt 0.16261210 0.72453678
+vt 0.21681613 0.99105531
+f 1/1 2/2 3/3
+f 4/4 5/5 6/6
+f 11/11 9/9 10/10
+f 12/12 13/13 14/14
+f 16/16 1/1 3/3
+f 4/4 6/6 7/7
+f 9/9 11/11 8/8
+f 12/12 14/14 15/15
+f 4/4 16/16 3/3
+f 15/15 11/11 12/12
+f 7/7 16/16 4/4
+f 11/11 15/15 8/8
+f 8/8 16/16 7/7
+f 16/16 8/8 15/15
+f 22/22 24/24 23/23
+f 17/17 20/20 19/19
+f 19/19 18/18 17/17
+f 17/17 27/27 26/26
+f 24/24 22/22 50/50
+f 25/25 17/17 26/26
+f 50/50 22/22 21/21
+f 20/20 17/17 25/25
+f 25/25 50/50 21/21
+f 20/20 25/25 21/21
+f 28/28 29/29 30/30
+f 42/42 32/32 33/33
+f 34/34 35/35 36/36
+f 36/36 37/37 38/38
+f 41/41 39/39 40/40
+f 43/43 44/44 45/45
+f 46/46 28/28 30/30
+f 36/36 33/33 34/34
+f 39/39 41/41 38/38
+f 43/43 45/45 46/46
+f 43/43 30/30 31/31
+f 42/42 33/33 36/36
+f 36/36 38/38 41/41
+f 30/30 43/43 46/46
+f 36/36 41/41 42/42
+f 42/42 43/43 31/31
+f 32/32 42/42 31/31
+f 47/47 48/48 49/49
+
diff --git a/ai_002_001/background_mesh/10.obj b/ai_002_001/background_mesh/10.obj
new file mode 100644
index 0000000000000000000000000000000000000000..c216104cfe26bf130cd3eae7590e44fc65f60b94
--- /dev/null
+++ b/ai_002_001/background_mesh/10.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.60937691 -4.92792606 -1.84001708
+v 0.60944974 -4.92792654 0.86411911
+v 0.60959530 -9.79473400 0.86389583
+v 0.60952193 -9.78509140 -1.84610534
+vt 0.00224640 1.00000000
+vt 1.00000000 0.99999988
+vt 0.99991751 0.00000000
+vt 0.00000000 0.00198130
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_002_001/background_mesh/11.obj b/ai_002_001/background_mesh/11.obj
new file mode 100644
index 0000000000000000000000000000000000000000..a1fa2ac06acebf7ce76732d35b404628dafa0273
--- /dev/null
+++ b/ai_002_001/background_mesh/11.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.65855819 -9.83567524 -4.55246782
+v 0.65861440 -9.83566475 -2.46753216
+v 0.65864575 -10.88432980 -2.46753216
+v 0.65859008 -10.89399147 -4.54364538
+vt 0.00000000 0.99999011
+vt 1.00000000 1.00000000
+vt 1.00000000 0.00912920
+vt 0.00423152 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_002_001/background_mesh/12.obj b/ai_002_001/background_mesh/12.obj
new file mode 100644
index 0000000000000000000000000000000000000000..2a526349c4fe88f3f22421e3303384b9f2de5097
--- /dev/null
+++ b/ai_002_001/background_mesh/12.obj
@@ -0,0 +1,72 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.70895886 -5.15793180 -4.37315273
+v 0.70895976 -5.15793180 -1.84001708
+v 0.70896387 -8.68482876 -1.85684705
+v 0.70896298 -8.68482876 -4.37315273
+v 0.70896006 -5.55375481 -2.28094363
+v 0.70896000 -5.42652607 -2.23853397
+v 0.70896000 -5.42652607 -2.16785121
+v 0.70896018 -5.61030102 -2.18198776
+v 0.70896018 -5.61030102 -2.21026087
+v 0.70896018 -5.62443781 -2.18198776
+v 0.70896053 -5.90716887 -2.19612432
+v 0.70896041 -5.90716887 -2.46471882
+v 0.70896024 -5.68098402 -2.35162640
+v 0.70896024 -5.68098402 -2.32335329
+v 0.70896113 -6.81190777 -3.52495980
+v 0.70896107 -6.78363466 -3.48255014
+v 0.70896083 -6.37367487 -2.81813240
+v 0.70896047 -5.97785139 -2.52126479
+v 0.70896047 -5.94957829 -2.49299169
+v 0.70896059 -5.96371460 -2.21026087
+v 0.70896357 -8.50829315 -2.22439742
+v 0.70896286 -8.50829315 -4.28833342
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 0.99335605 0.00000000
+vt 0.00000000 0.00000000
+vt 0.82593644 0.88777018
+vt 0.84267843 0.92384404
+vt 0.87058169 0.92384404
+vt 0.86500102 0.87173736
+vt 0.85383976 0.87173736
+vt 0.86500102 0.86772907
+vt 0.85942036 0.78756481
+vt 0.75338799 0.78756481
+vt 0.79803318 0.85169619
+vt 0.80919451 0.85169619
+vt 0.33483914 0.53103936
+vt 0.35158110 0.53905576
+vt 0.61387169 0.65529382
+vt 0.73106545 0.76752383
+vt 0.74222678 0.77554023
+vt 0.85383976 0.77153206
+vt 0.84825909 0.05005409
+vt 0.03348392 0.05005409
+f 20/20 19/19 12/12
+f 10/10 9/9 8/8
+f 5/5 14/14 13/13
+f 18/18 12/12 19/19
+f 15/15 22/22 1/1
+f 4/4 1/1 22/22
+f 20/20 12/12 11/11
+f 2/2 8/8 7/7
+f 6/6 5/5 13/13
+f 12/12 18/18 13/13
+f 16/16 15/15 1/1
+f 21/21 4/4 22/22
+f 2/2 20/20 11/11
+f 8/8 2/2 10/10
+f 17/17 1/1 18/18
+f 1/1 17/17 16/16
+f 4/4 21/21 3/3
+f 10/10 2/2 11/11
+f 18/18 1/1 13/13
+f 20/20 3/3 21/21
+f 13/13 1/1 6/6
+f 20/20 2/2 3/3
+f 2/2 6/6 1/1
+f 6/6 2/2 7/7
+
diff --git a/ai_002_001/background_mesh/13.obj b/ai_002_001/background_mesh/13.obj
new file mode 100644
index 0000000000000000000000000000000000000000..0591c35724b84b3bc65a238427b357655f2f94d4
--- /dev/null
+++ b/ai_002_001/background_mesh/13.obj
@@ -0,0 +1,182 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.76214296 -9.83566761 -4.54364538
+v 0.76214296 -9.83566570 -4.45071507
+v 0.70896429 -9.83567142 -4.45071507
+v 0.70896429 -9.83567047 -4.35071468
+v 0.76214296 -9.83566570 -4.35071468
+v 0.76214296 -9.83566475 -4.30785751
+v 0.70896435 -9.83567047 -4.30785751
+v 0.70896435 -9.83566952 -4.20785761
+v 0.76214296 -9.83566475 -4.20785761
+v 0.76214296 -9.83566475 -4.17928600
+v 0.70896435 -9.83566952 -4.17928600
+v 0.70896441 -9.83566856 -4.07928610
+v 0.76214296 -9.83566380 -4.07928610
+v 0.76214296 -9.83566380 -4.03642893
+v 0.70896441 -9.83566856 -4.03642893
+v 0.76214296 -9.83566380 -4.02214336
+v 0.70896447 -9.83566856 -4.00785732
+v 0.70896447 -9.83566856 -3.95071459
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+v 0.76214296 -9.83566284 -3.92214298
+v 0.70896447 -9.83566856 -3.92214298
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+v 0.65861404 -9.83566475 -2.47928429
+v 0.64785719 -9.83567715 -4.54364538
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+vt 0.04501650 1.00000000
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+vt 0.09345783 0.53468686
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+vt 0.59863007 1.00000000
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+vt 0.77163428 0.53469157
+vt 0.77855438 1.00000000
+vt 0.99307966 1.00000000
+vt 1.00000000 0.09412239
+vt 0.00000000 0.00000000
+f 1/1 2/2 3/3
+f 7/7 5/5 6/6
+f 8/8 9/9 10/10
+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 29/29 30/30
+f 35/35 33/33 34/34
+f 36/36 37/37 38/38
+f 39/39 40/40 41/41
+f 45/45 43/43 44/44
+f 46/46 47/47 48/48
+f 53/53 51/51 52/52
+f 56/56 54/54 55/55
+f 59/59 57/57 58/58
+f 60/60 1/1 3/3
+f 5/5 7/7 4/4
+f 8/8 10/10 11/11
+f 12/12 14/14 15/15
+f 60/60 17/17 18/18
+f 18/18 20/20 21/21
+f 22/22 24/24 21/21
+f 25/25 27/27 28/28
+f 29/29 31/31 28/28
+f 33/33 35/35 32/32
+f 43/43 45/45 42/42
+f 46/46 48/48 49/49
+f 51/51 53/53 50/50
+f 54/54 56/56 53/53
+f 57/57 59/59 56/56
+f 4/4 60/60 3/3
+f 60/60 7/7 8/8
+f 60/60 12/12 15/15
+f 60/60 18/18 21/21
+f 60/60 25/25 28/28
+f 60/60 35/35 36/36
+f 60/60 46/46 59/59
+f 59/59 53/53 56/56
+f 7/7 60/60 4/4
+f 60/60 8/8 11/11
+f 60/60 21/21 24/24
+f 60/60 28/28 31/31
+f 60/60 36/36 38/38
+f 59/59 46/46 49/49
+f 53/53 59/59 50/50
+f 12/12 60/60 11/11
+f 17/17 60/60 15/15
+f 35/35 60/60 32/32
+f 60/60 38/38 39/39
+f 59/59 49/49 50/50
+f 25/25 60/60 24/24
+f 60/60 39/39 41/41
+f 46/46 60/60 45/45
+f 32/32 60/60 31/31
+f 45/45 60/60 42/42
+f 42/42 60/60 41/41
+
diff --git a/ai_002_001/background_mesh/14.obj b/ai_002_001/background_mesh/14.obj
new file mode 100644
index 0000000000000000000000000000000000000000..1338b4f2b92f56fb706cf4bbdd8e0bff0af5b85e
--- /dev/null
+++ b/ai_002_001/background_mesh/14.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.06452394 -3.28617787 0.86421943
+v 0.06452370 -3.28553653 -3.31208205
+v -4.69259596 -3.28347993 -3.31208134
+v -4.69259596 -3.28411961 0.85208410
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 0.99999976 0.00000005
+vt 0.00290580 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_002_001/background_mesh/15.obj b/ai_002_001/background_mesh/15.obj
new file mode 100644
index 0000000000000000000000000000000000000000..828b16431b913ac695265fcc30d0518f7a1e388d
--- /dev/null
+++ b/ai_002_001/background_mesh/15.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -11.74328232 -10.31464767 0.86443865
+v -11.74327755 -10.31464767 -0.16211271
+v -11.74327564 -10.48535252 -0.16211271
+v -11.74328041 -10.48535442 0.86443079
+vt 0.00000000 1.00000000
+vt 1.00000000 1.00000000
+vt 1.00000000 0.00001117
+vt 0.00000766 0.00000000
+f 4/4 2/2 3/3
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index 0000000000000000000000000000000000000000..b77052d6809eccca2967f0f192641336a9dbc871
--- /dev/null
+++ b/ai_002_001/background_mesh/2.obj
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diff --git a/ai_002_001/background_mesh/3.obj b/ai_002_001/background_mesh/3.obj
new file mode 100644
index 0000000000000000000000000000000000000000..44b63c74034ce5e0a9a27f7885e032e78e4f68e5
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diff --git a/ai_002_001/background_mesh/4.obj b/ai_002_001/background_mesh/4.obj
new file mode 100644
index 0000000000000000000000000000000000000000..e115a5d88c5ac186f3c6e715cc35cfcb17fcc45d
--- /dev/null
+++ b/ai_002_001/background_mesh/4.obj
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diff --git a/ai_002_001/background_mesh/5.obj b/ai_002_001/background_mesh/5.obj
new file mode 100644
index 0000000000000000000000000000000000000000..6bae465a126dd94155a4ace2f3922e83632c6c1b
--- /dev/null
+++ b/ai_002_001/background_mesh/5.obj
@@ -0,0 +1,192 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+
diff --git a/ai_002_001/background_mesh/6.obj b/ai_002_001/background_mesh/6.obj
new file mode 100644
index 0000000000000000000000000000000000000000..4a5258df224ce3ccda3e315c9a5abc74981e326f
--- /dev/null
+++ b/ai_002_001/background_mesh/6.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.65858954 -10.88432980 -4.55208683
+v 0.65863842 -10.88432980 -2.73791313
+v -1.24669302 -10.88425255 -2.73791337
+v -1.24669302 -10.88425159 -4.54364538
+vt 0.00000000 0.99997437
+vt 1.00000000 1.00000000
+vt 0.99999988 0.00000000
+vt 0.00465305 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_002_001/background_mesh/7.obj b/ai_002_001/background_mesh/7.obj
new file mode 100644
index 0000000000000000000000000000000000000000..28beac8b932dbe3bfa407fd3d9971ce1ac7bcab5
--- /dev/null
+++ b/ai_002_001/background_mesh/7.obj
@@ -0,0 +1,194 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.56724167 -13.58137894 -4.13034487
+v 3.58137989 -13.58137989 -4.27172422
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+# https://github.com/mikedh/trimesh
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