diff --git a/ai_001_007/background_mesh/1.obj b/ai_001_007/background_mesh/1.obj
new file mode 100644
index 0000000000000000000000000000000000000000..808a0b8a07afd0cc3b4ad639cf937bb33ac02587
--- /dev/null
+++ b/ai_001_007/background_mesh/1.obj
@@ -0,0 +1,127 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_007/background_mesh/10.obj b/ai_001_007/background_mesh/10.obj
new file mode 100644
index 0000000000000000000000000000000000000000..77f9c0761c3e765e00f510072fa76f05e36be7a7
--- /dev/null
+++ b/ai_001_007/background_mesh/10.obj
@@ -0,0 +1,185 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.24719733 2.66288519 -2.62173867
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diff --git a/ai_001_007/background_mesh/11.obj b/ai_001_007/background_mesh/11.obj
new file mode 100644
index 0000000000000000000000000000000000000000..7c27f21602e455633a729c0faaa1773319fe4076
--- /dev/null
+++ b/ai_001_007/background_mesh/11.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 1.07300198 -2.21256518 -2.59430027
+v 1.07300210 -2.21256566 -2.69788361
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+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_007/background_mesh/12.obj b/ai_001_007/background_mesh/12.obj
new file mode 100644
index 0000000000000000000000000000000000000000..38f1dcf0d8c81e920936d1c371fc108984f3e418
--- /dev/null
+++ b/ai_001_007/background_mesh/12.obj
@@ -0,0 +1,29 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_007/background_mesh/13.obj b/ai_001_007/background_mesh/13.obj
new file mode 100644
index 0000000000000000000000000000000000000000..b1134f072f61500b0c14d5386de04aa67299215b
--- /dev/null
+++ b/ai_001_007/background_mesh/13.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 1.65358019 2.54903436 -2.69799685
+v 1.65358412 2.54903460 -2.59441352
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+f 2/2 4/4 1/1
+
diff --git a/ai_001_007/background_mesh/14.obj b/ai_001_007/background_mesh/14.obj
new file mode 100644
index 0000000000000000000000000000000000000000..b22780e6a0ff5e699785390b2f7df5d0504908da
--- /dev/null
+++ b/ai_001_007/background_mesh/14.obj
@@ -0,0 +1,113 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+f 29/29 13/13 31/31
+f 22/22 19/19 23/23
+f 19/19 22/22 15/15
+f 24/24 1/1 20/20
+f 17/17 33/33 18/18
+f 15/15 22/22 16/16
+f 21/21 20/20 1/1
+f 33/33 17/17 4/4
+f 16/16 22/22 21/21
+f 16/16 3/3 17/17
+f 3/3 4/4 17/17
+f 1/1 16/16 21/21
+f 3/3 16/16 1/1
+f 6/6 7/7 8/8
+f 8/8 34/34 6/6
+f 35/35 9/9 10/10
+f 9/9 35/35 36/36
+f 37/37 11/11 12/12
+
diff --git a/ai_001_007/background_mesh/15.obj b/ai_001_007/background_mesh/15.obj
new file mode 100644
index 0000000000000000000000000000000000000000..5929419fcd61d6b64da2e5e8536e1f6556be737e
--- /dev/null
+++ b/ai_001_007/background_mesh/15.obj
@@ -0,0 +1,104 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.22023273 1.68504226 -2.41520786
+v 3.36209321 1.68504024 -2.41520834
+v 3.38243937 1.65878189 -2.41521049
+v 3.38271499 -2.63959098 -2.41553164
+v 3.36209249 -2.66368628 -2.41553330
+v 3.38274860 -3.16447449 -2.41557097
+v 3.36209226 -3.19783473 -2.41557312
+v 3.38276219 -3.37726498 -2.41558695
+v 2.12790680 -3.37726641 -2.41558146
+v 2.12790775 -3.19778633 -2.41556787
+v 3.16348934 -3.19782686 -2.41557240
+v 3.19763041 -3.22122002 -2.41557431
+v 3.22023225 -3.19782901 -2.41557264
+v 3.19763064 -3.16447592 -2.41557002
+v 3.19763303 -2.69633627 -2.41553497
+v 3.22023320 -2.66368055 -2.41553283
+v 3.19763327 -2.63959217 -2.41553068
+v 3.19763589 -2.12889433 -2.41549253
+v 2.73790693 -2.21401072 -2.41549706
+v 2.65279078 -1.63238263 -2.41545343
+v 2.12790680 -1.41959202 -2.41543508
+v 2.12790680 0.41040814 -2.41529822
+v 2.48255825 0.22598958 -2.41531372
+v 2.63860464 -0.05773139 -2.41533542
+v 2.68116283 -0.07191741 -2.41533685
+v 2.73790693 -0.21377790 -2.41534758
+v 2.78046513 -0.22796404 -2.41534877
+v 2.82302332 -0.35563838 -2.41535854
+v 2.86558151 -0.36982441 -2.41535997
+v 2.95069766 -0.55424309 -2.41537404
+v 3.00744200 -0.59680122 -2.41537738
+v 3.09255815 -0.78121984 -2.41539168
+v 3.19764280 -0.80959219 -2.41539407
+v 3.19765544 1.65878046 -2.41520953
+vt 0.87047952 1.00000000
+vt 0.98352879 0.99999964
+vt 0.99974275 0.99481255
+vt 0.99996239 0.14571919
+vt 0.98352820 0.14095944
+vt 0.99998915 0.04203456
+vt 0.98352802 0.03544464
+vt 1.00000000 0.00000028
+vt 0.00000000 0.00000000
+vt 0.00000076 0.03545420
+vt 0.82526046 0.03544619
+vt 0.85246766 0.03082515
+vt 0.87047917 0.03544577
+vt 0.85246783 0.04203428
+vt 0.85246974 0.13450982
+vt 0.87047988 0.14096057
+vt 0.85246992 0.14571895
+vt 0.85247201 0.24660136
+vt 0.48611191 0.22978760
+vt 0.41828245 0.34468144
+vt 0.00000000 0.38671577
+vt 0.00000000 0.74821091
+vt 0.28262335 0.71178120
+vt 0.40697744 0.65573543
+vt 0.44089225 0.65293312
+vt 0.48611191 0.62491024
+vt 0.52002668 0.62210798
+vt 0.55394155 0.59688735
+vt 0.58785635 0.59408510
+vt 0.65568578 0.55765533
+vt 0.70090562 0.54924846
+vt 0.76873505 0.51281869
+vt 0.85247749 0.50721413
+vt 0.85248756 0.99481237
+f 1/1 2/2 3/3
+f 16/16 4/4 5/5
+f 13/13 6/6 7/7
+f 12/12 8/8 9/9
+f 9/9 10/10 11/11
+f 5/5 15/15 16/16
+f 4/4 17/17 18/18
+f 18/18 19/19 20/20
+f 24/24 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 30/30 31/31 32/32
+f 3/3 34/34 1/1
+f 33/33 3/3 4/4
+f 9/9 11/11 12/12
+f 15/15 5/5 6/6
+f 26/26 21/21 24/24
+f 28/28 21/21 26/26
+f 20/20 33/33 18/18
+f 34/34 3/3 33/33
+f 8/8 12/12 7/7
+f 30/30 21/21 28/28
+f 18/18 33/33 4/4
+f 7/7 12/12 13/13
+f 32/32 21/21 30/30
+f 33/33 20/20 32/32
+f 14/14 6/6 13/13
+f 21/21 32/32 20/20
+f 15/15 6/6 14/14
+f 4/4 16/16 17/17
+
diff --git a/ai_001_007/background_mesh/16.obj b/ai_001_007/background_mesh/16.obj
new file mode 100644
index 0000000000000000000000000000000000000000..47476c3e4d5f60b33145fbe3faaae9b64489c104
--- /dev/null
+++ b/ai_001_007/background_mesh/16.obj
@@ -0,0 +1,26 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.21207190 3.19822502 -0.00099932
+v 3.21207190 3.19829965 -2.62121820
+v -1.51134646 3.19836688 -2.61333323
+v -1.51135063 3.19829249 0.00333345
+v 1.00558579 3.19825649 -0.00097997
+v 1.00558543 3.19831562 -2.06171155
+v 1.89666653 3.19830275 -2.06171155
+v 1.89666653 3.19824386 -0.00098778
+vt 0.00165087 1.00000000
+vt 1.00000000 1.00000000
+vt 0.99699569 0.00000086
+vt 0.00000000 0.00000000
+vt 0.00164351 0.53286284
+vt 0.78681809 0.53286278
+vt 0.78681809 0.72151434
+vt 0.00164646 0.72151434
+f 6/6 4/4 5/5
+f 7/7 8/8 1/1
+f 4/4 6/6 3/3
+f 7/7 1/1 2/2
+f 2/2 3/3 6/6
+f 6/6 7/7 2/2
+
diff --git a/ai_001_007/background_mesh/17.obj b/ai_001_007/background_mesh/17.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9f9bbdc62dca92267a8f27bd05cbaeb9593afded
--- /dev/null
+++ b/ai_001_007/background_mesh/17.obj
@@ -0,0 +1,29 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.38245630 1.68498147 -0.36449039
+v 3.38243747 1.68504095 -2.45550942
+v 3.33844399 1.68504059 -2.41520834
+v 3.25070882 1.68504179 -2.41520786
+v 3.19765568 1.68504357 -2.45550919
+v 3.19221878 1.68498540 -0.40620524
+v 3.19765639 1.68498409 -0.36449039
+v 3.25070429 1.68498456 -0.40621126
+v 3.33843946 1.68498337 -0.40622023
+vt 0.00000000 1.00000000
+vt 1.00000000 0.99990100
+vt 0.98072648 0.76864547
+vt 0.98072624 0.30745795
+vt 0.99999976 0.02857952
+vt 0.01994953 0.00000000
+vt 0.00000000 0.02858328
+vt 0.01995241 0.30743414
+vt 0.01995668 0.76862168
+f 9/9 2/2 3/3
+f 4/4 5/5 6/6
+f 6/6 7/7 8/8
+f 2/2 9/9 1/1
+f 8/8 4/4 6/6
+f 4/4 9/9 3/3
+f 9/9 4/4 8/8
+
diff --git a/ai_001_007/background_mesh/18.obj b/ai_001_007/background_mesh/18.obj
new file mode 100644
index 0000000000000000000000000000000000000000..58fb80e8d71cac13513ea06ad8b195552b4f2eec
--- /dev/null
+++ b/ai_001_007/background_mesh/18.obj
@@ -0,0 +1,78 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.36209345 1.68498302 -0.40622267
+v 3.22023296 1.68498504 -0.40620813
+v 3.19765615 1.65383768 -0.40620297
+v 3.19764972 0.41965151 -0.40608987
+v 3.24860477 0.40546525 -0.40609375
+v 3.19764972 0.40546536 -0.40608856
+v 3.19763112 -3.18360519 -0.40575960
+v 2.12790751 -3.19772935 -0.40564865
+v 2.12790704 -3.36802387 -0.40563300
+v 3.38277984 -3.36802268 -0.40576166
+v 3.36209273 -3.19777775 -0.40577516
+v 3.38276696 -3.16941762 -0.40577987
+v 3.36209249 -2.66362929 -0.40582412
+v 3.38273239 -2.63034797 -0.40582928
+v 3.38253331 0.47639859 -0.40611398
+v 3.31953502 0.47639549 -0.40610752
+v 3.31953502 0.50476778 -0.40611011
+v 3.38253140 0.50477099 -0.40611660
+v 2.89395356 -3.01337242 -0.40574405
+v 2.82302332 -2.95662832 -0.40574196
+v 2.85139561 -2.91407013 -0.40574878
+v 2.80883741 -2.91407013 -0.40574440
+v 2.58186054 -2.89988422 -0.40572247
+v 2.79465127 -2.98500061 -0.40573648
+v 2.80883741 -3.02755833 -0.40573400
+v 2.89395356 -3.04174471 -0.40574142
+vt 0.01648482 0.99999964
+vt 0.12953253 1.00000000
+vt 0.14752384 0.99383587
+vt 0.14752898 0.74958807
+vt 0.10692322 0.74678063
+vt 0.14752898 0.74678063
+vt 0.14754382 0.03649680
+vt 0.99999964 0.03370161
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00000024
+vt 0.01648542 0.03369203
+vt 0.00001026 0.03930455
+vt 0.01648561 0.13940102
+vt 0.00003781 0.14598745
+vt 0.00019643 0.76081848
+vt 0.05039936 0.76081783
+vt 0.05039936 0.76643276
+vt 0.00019795 0.76643342
+vt 0.38954249 0.07018619
+vt 0.44606635 0.08141595
+vt 0.42345664 0.08983830
+vt 0.45737100 0.08983830
+vt 0.63824737 0.09264572
+vt 0.46867585 0.07580102
+vt 0.45737100 0.06737877
+vt 0.38954249 0.06457126
+f 1/1 2/2 3/3
+f 16/16 4/4 5/5
+f 13/13 6/6 7/7
+f 7/7 8/8 9/9
+f 7/7 10/10 11/11
+f 7/7 12/12 13/13
+f 5/5 15/15 16/16
+f 3/3 18/18 1/1
+f 4/4 17/17 3/3
+f 10/10 7/7 9/9
+f 15/15 5/5 14/14
+f 18/18 3/3 17/17
+f 12/12 7/7 11/11
+f 6/6 14/14 5/5
+f 4/4 16/16 17/17
+f 14/14 6/6 13/13
+f 20/20 21/21 22/22
+f 19/19 25/25 26/26
+f 25/25 19/19 20/20
+f 22/22 23/23 24/24
+f 25/25 20/20 24/24
+f 22/22 24/24 20/20
+
diff --git a/ai_001_007/background_mesh/19.obj b/ai_001_007/background_mesh/19.obj
new file mode 100644
index 0000000000000000000000000000000000000000..f3a92867b02b54bcd35f45d0c4b27fec0ff37722
--- /dev/null
+++ b/ai_001_007/background_mesh/19.obj
@@ -0,0 +1,53 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.38243842 1.67595029 -2.41520929
+v 3.38243794 1.68503916 -2.39376736
+v 3.38243914 1.66179776 -2.41521025
+v 3.38251352 0.50109529 -2.41529703
+v 3.38251352 0.51524651 -2.28052807
+v 3.38251662 0.47278178 -2.25221825
+v 3.38251996 0.45862687 -2.01158452
+v 3.38252378 0.44447196 -1.65771127
+v 3.38253450 0.44447196 -0.48285210
+v 3.38253450 0.45862746 -0.40611237
+v 3.38245630 1.67595148 -0.40622392
+v 3.38267827 -2.04679561 -2.22390842
+v 3.38267922 -2.07510543 -2.35130286
+v 3.38268900 -2.23080969 -2.36545777
+v 3.38268876 -2.23080707 -2.41550112
+v 3.38269496 -2.04679108 -0.40588275
+v 3.38270950 -2.55567622 -2.41552544
+vt 0.00015731 0.99785674
+vt 0.01082684 1.00000000
+vt 0.00015684 0.99451941
+vt 0.00011365 0.72081506
+vt 0.06717481 0.72415203
+vt 0.08126181 0.71413851
+vt 0.20100138 0.71080065
+vt 0.37708902 0.70746279
+vt 0.96170002 0.70746279
+vt 0.99988586 0.71080071
+vt 0.99983037 0.99785697
+vt 0.09534880 0.11999876
+vt 0.03195721 0.11332305
+vt 0.02491372 0.07660653
+vt 0.00001210 0.07660715
+vt 1.00000000 0.11999983
+vt 0.00000000 0.00000000
+f 1/1 2/2 3/3
+f 4/4 5/5 6/6
+f 10/10 11/11 16/16
+f 13/13 14/14 15/15
+f 4/4 17/17 1/1
+f 1/1 3/3 4/4
+f 9/9 10/10 16/16
+f 17/17 4/4 15/15
+f 8/8 9/9 16/16
+f 13/13 15/15 4/4
+f 12/12 8/8 16/16
+f 12/12 13/13 4/4
+f 8/8 12/12 7/7
+f 6/6 12/12 4/4
+f 7/7 12/12 6/6
+
diff --git a/ai_001_007/background_mesh/2.obj b/ai_001_007/background_mesh/2.obj
new file mode 100644
index 0000000000000000000000000000000000000000..166b40837f8e1c8acfa4a4a92fb31ae04d69ec64
--- /dev/null
+++ b/ai_001_007/background_mesh/2.obj
@@ -0,0 +1,43 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.38274884 -3.19784093 -2.61229801
+v 3.38276029 -3.19780493 -1.34033263
+v 3.35380077 -3.19780278 -1.30117035
+v 3.38276076 -3.19780326 -1.28380072
+v 3.38277245 -3.19776702 0.00229776
+v -1.52206683 -3.19757485 -0.00081231
+v -1.51162958 -3.19764900 -2.61229801
+v 2.64715314 -3.19780660 -2.41557002
+v 3.19763041 -3.19782782 -2.40030336
+v 3.19763112 -3.19777060 -0.37929183
+v 3.18420410 -3.19777060 -0.40575692
+v 2.11010003 -3.19772863 -0.40564680
+v 2.12423396 -3.19778609 -2.41556764
+vt 0.00000000 0.99999511
+vt 0.48648641 0.99999750
+vt 0.50146472 0.99409324
+vt 0.50810808 0.99999756
+vt 1.00000000 1.00000000
+vt 0.99881047 0.00000000
+vt 0.00000000 0.00212795
+vt 0.07524221 0.85002166
+vt 0.08108123 0.96225309
+vt 0.85405403 0.96225327
+vt 0.84393197 0.95951581
+vt 0.84397411 0.74052715
+vt 0.07524313 0.74340880
+f 1/1 8/8 13/13
+f 12/12 11/11 10/10
+f 9/9 8/8 1/1
+f 9/9 2/2 3/3
+f 10/10 4/4 5/5
+f 7/7 1/1 13/13
+f 2/2 9/9 1/1
+f 12/12 7/7 13/13
+f 9/9 3/3 10/10
+f 7/7 12/12 6/6
+f 4/4 10/10 3/3
+f 5/5 6/6 12/12
+f 12/12 10/10 5/5
+
diff --git a/ai_001_007/background_mesh/20.obj b/ai_001_007/background_mesh/20.obj
new file mode 100644
index 0000000000000000000000000000000000000000..d4d82502698dbf98259367a0b0231c917e6f5928
--- /dev/null
+++ b/ai_001_007/background_mesh/20.obj
@@ -0,0 +1,39 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -1.51148021 0.22673200 -1.30129313
+v -1.45499992 0.22673076 -1.30129242
+v -1.45499992 0.19826922 -1.30129194
+v -1.51148140 0.19827046 -1.30129266
+v -1.45499992 0.14134616 -1.30129099
+v -1.42653847 0.11288461 -1.30129015
+v -1.42653847 -0.07211539 -1.30128717
+v -1.51149344 -0.07211415 -1.30128849
+v -1.51148713 0.07019418 -1.30129063
+v -1.45499992 0.07019231 -1.30128992
+v -1.45499992 0.09865385 -1.30129039
+v -1.51148522 0.11288648 -1.30129135
+v -1.45499992 0.11288461 -1.30129063
+vt 0.00015576 1.00000000
+vt 0.66498190 0.99999589
+vt 0.66498190 0.90475816
+vt 0.00014172 0.90476239
+vt 0.66498190 0.71428281
+vt 1.00000000 0.61904508
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00000414
+vt 0.00007437 0.47619483
+vt 0.66498190 0.47618854
+vt 0.66498190 0.57142627
+vt 0.00009682 0.61905140
+vt 0.66498190 0.61904508
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+f 10/10 6/6 7/7
+f 10/10 8/8 9/9
+f 11/11 12/12 13/13
+f 6/6 13/13 5/5
+f 8/8 10/10 7/7
+f 6/6 11/11 13/13
+f 6/6 10/10 11/11
+
diff --git a/ai_001_007/background_mesh/21.obj b/ai_001_007/background_mesh/21.obj
new file mode 100644
index 0000000000000000000000000000000000000000..a8a59b14310d431675bcf17f3a09d263ad8634ab
--- /dev/null
+++ b/ai_001_007/background_mesh/21.obj
@@ -0,0 +1,17 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 1.65216231 2.66277909 -2.59441614
+v 1.65357816 2.66277599 -2.66581202
+v 1.60918903 2.66277790 -2.69799900
+v 1.10783744 2.66281629 -2.69799471
+v 1.10783768 2.66282082 -2.59441137
+vt 0.00004603 0.99740565
+vt 0.68927771 1.00000000
+vt 1.00000000 0.91866261
+vt 0.99995857 0.00000000
+vt 0.00000000 0.00000044
+f 1/1 2/2 3/3
+f 3/3 4/4 5/5
+f 5/5 1/1 3/3
+
diff --git a/ai_001_007/background_mesh/3.obj b/ai_001_007/background_mesh/3.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9076996567a8b6be4fe8507fa0072148f8df3a3b
--- /dev/null
+++ b/ai_001_007/background_mesh/3.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -1.51135039 3.20485210 -0.00095805
+v -1.51134646 3.19836688 -2.61338830
+v -1.51162958 -3.19764900 -2.61338830
+v -1.51163399 -3.20271254 -0.00081229
+vt 0.00005580 1.00000000
+vt 1.00000000 0.99898785
+vt 1.00000000 0.00079024
+vt 0.00000000 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_007/background_mesh/4.obj b/ai_001_007/background_mesh/4.obj
new file mode 100644
index 0000000000000000000000000000000000000000..a0b9542d4c38059d6ca413ae52f7f0e774bd5efd
--- /dev/null
+++ b/ai_001_007/background_mesh/4.obj
@@ -0,0 +1,194 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -1.51618195 3.19836640 -2.60519838
+v 3.21146226 3.19829893 -2.60523987
+v 3.19763041 -3.18165755 -2.60509467
+v -1.51162887 -3.18165779 -2.60505319
+v 1.45628881 2.12632585 -2.60520029
+v 1.07319391 2.12632704 -2.60519695
+v 1.07321584 2.62173891 -2.60520816
+v 1.10242307 2.66282058 -2.60520935
+v 1.68276477 2.66277647 -2.60521436
+v 1.65358126 2.63589168 -2.60521340
+v 1.65359521 2.12632537 -2.60520196
+v 1.48459756 1.68507230 -2.60519052
+v 1.59783447 1.68507075 -2.60519147
+v 1.65360606 1.72999763 -2.60519290
+v 1.69691682 1.68506932 -2.60519242
+v 1.65360641 1.71584272 -2.60519266
+v 1.61198914 1.68507051 -2.60519147
+v 1.86677289 1.63091421 -2.60519266
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diff --git a/ai_001_007/background_mesh/5.obj b/ai_001_007/background_mesh/5.obj
new file mode 100644
index 0000000000000000000000000000000000000000..fcacf378a823da22576d07502f9675da1dae9dc9
--- /dev/null
+++ b/ai_001_007/background_mesh/5.obj
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diff --git a/ai_001_007/background_mesh/6.obj b/ai_001_007/background_mesh/6.obj
new file mode 100644
index 0000000000000000000000000000000000000000..dc006156f89e65c8c35046b3cf43a446ce81495f
--- /dev/null
+++ b/ai_001_007/background_mesh/6.obj
@@ -0,0 +1,264 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_007/background_mesh/7.obj b/ai_001_007/background_mesh/7.obj
new file mode 100644
index 0000000000000000000000000000000000000000..2bb8a3ddc1918f5be037f03a922acf7f71f7bba7
--- /dev/null
+++ b/ai_001_007/background_mesh/7.obj
@@ -0,0 +1,17 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 1.70499921 -2.66362906 -2.69787884
+v 1.70499921 -2.66362619 -2.59429550
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+
diff --git a/ai_001_007/background_mesh/8.obj b/ai_001_007/background_mesh/8.obj
new file mode 100644
index 0000000000000000000000000000000000000000..95e78f97205892616b763eca02dc78c8db395312
--- /dev/null
+++ b/ai_001_007/background_mesh/8.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_007/background_mesh/9.obj b/ai_001_007/background_mesh/9.obj
new file mode 100644
index 0000000000000000000000000000000000000000..2fb34a44c85317aecba0e44e935b0ae0d276e45f
--- /dev/null
+++ b/ai_001_007/background_mesh/9.obj
@@ -0,0 +1,305 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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