diff --git a/ai_001_008/background_mesh/1.obj b/ai_001_008/background_mesh/1.obj
new file mode 100644
index 0000000000000000000000000000000000000000..95713d173c787df6c9e3153b87e2272b156b88ab
--- /dev/null
+++ b/ai_001_008/background_mesh/1.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 4.94930792 6.40697908 -0.00069132
+v -4.00246525 6.40697908 -0.00081273
+v -4.00246525 -0.21230417 -0.00120630
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+vt 1.00000000 0.00000000
+vt 0.00000000 0.00001318
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/10.obj b/ai_001_008/background_mesh/10.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9414fb0714f10d22181b464098619641174c266f
--- /dev/null
+++ b/ai_001_008/background_mesh/10.obj
@@ -0,0 +1,32 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.89856291 6.20773125 -2.59572911
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+vt 0.00243742 1.00000000
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+f 10/10 3/3 4/4
+f 6/6 10/10 4/4
+
diff --git a/ai_001_008/background_mesh/11.obj b/ai_001_008/background_mesh/11.obj
new file mode 100644
index 0000000000000000000000000000000000000000..48e67484e32c29ca79487f335e70e71b4354d5fb
--- /dev/null
+++ b/ai_001_008/background_mesh/11.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+v -0.00342597 0.10214260 -0.06064595
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+vt 0.00000000 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/12.obj b/ai_001_008/background_mesh/12.obj
new file mode 100644
index 0000000000000000000000000000000000000000..66390221187bfc90445208a2be0e41952fc2c612
--- /dev/null
+++ b/ai_001_008/background_mesh/12.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/13.obj b/ai_001_008/background_mesh/13.obj
new file mode 100644
index 0000000000000000000000000000000000000000..8aa84338448fb6b0da22b981c2f81f86de0816a0
--- /dev/null
+++ b/ai_001_008/background_mesh/13.obj
@@ -0,0 +1,23 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.04999638 3.79852557 -2.59572649
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diff --git a/ai_001_008/background_mesh/14.obj b/ai_001_008/background_mesh/14.obj
new file mode 100644
index 0000000000000000000000000000000000000000..5ed48ffa204ddda15371610003b4d990b1b8fc58
--- /dev/null
+++ b/ai_001_008/background_mesh/14.obj
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+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_008/background_mesh/15.obj b/ai_001_008/background_mesh/15.obj
new file mode 100644
index 0000000000000000000000000000000000000000..2692cede25b53892cb99927bb0cea587e6e246ce
--- /dev/null
+++ b/ai_001_008/background_mesh/15.obj
@@ -0,0 +1,17 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.93750072 0.11645038 -0.06067020
+v 2.91980958 0.11645042 0.00250005
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+f 3/3 4/4 5/5
+f 5/5 1/1 3/3
+
diff --git a/ai_001_008/background_mesh/16.obj b/ai_001_008/background_mesh/16.obj
new file mode 100644
index 0000000000000000000000000000000000000000..0f02b2a740872e1850d5747456ff9cc0f0ffcc51
--- /dev/null
+++ b/ai_001_008/background_mesh/16.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -0.02343464 0.12195635 -0.06064497
+v -0.02343174 0.11642174 0.00478269
+v -0.02342742 -0.21226539 0.00478267
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+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/17.obj b/ai_001_008/background_mesh/17.obj
new file mode 100644
index 0000000000000000000000000000000000000000..461135a8ca230dc0a0d4f62f25af61461f8e4825
--- /dev/null
+++ b/ai_001_008/background_mesh/17.obj
@@ -0,0 +1,360 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.89868212 -0.21223307 -1.79061210
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diff --git a/ai_001_008/background_mesh/18.obj b/ai_001_008/background_mesh/18.obj
new file mode 100644
index 0000000000000000000000000000000000000000..3647b4fe2ab57263a3e59056879c5d96de4a0ca3
--- /dev/null
+++ b/ai_001_008/background_mesh/18.obj
@@ -0,0 +1,82 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_008/background_mesh/19.obj b/ai_001_008/background_mesh/19.obj
new file mode 100644
index 0000000000000000000000000000000000000000..b174808e1addc54e92f53490caf7887ceb37fef5
--- /dev/null
+++ b/ai_001_008/background_mesh/19.obj
@@ -0,0 +1,54 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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diff --git a/ai_001_008/background_mesh/2.obj b/ai_001_008/background_mesh/2.obj
new file mode 100644
index 0000000000000000000000000000000000000000..3052fcc9ac27c939b46f9c87308ea44df0bb6b1c
--- /dev/null
+++ b/ai_001_008/background_mesh/2.obj
@@ -0,0 +1,2263 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+f 542/542 543/543 540/540
+f 568/568 569/569 570/570
+f 571/571 573/573 572/572
+f 581/581 583/583 582/582
+f 584/584 585/585 586/586
+f 586/586 587/587 584/584
+f 603/603 604/604 605/605
+f 606/606 607/607 608/608
+f 609/609 610/610 611/611
+f 612/612 613/613 614/614
+
diff --git a/ai_001_008/background_mesh/20.obj b/ai_001_008/background_mesh/20.obj
new file mode 100644
index 0000000000000000000000000000000000000000..3dc93bcb09f9089ccbc2b4af3f1520e9b8dc3e86
--- /dev/null
+++ b/ai_001_008/background_mesh/20.obj
@@ -0,0 +1,20 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 3.00034618 6.40230799 -2.59574270
+v 3.00041604 6.40231037 -0.00071803
+v 3.00041723 6.25615644 -0.00072672
+v 3.00041890 6.19957876 0.04461575
+v 3.00034642 6.19956779 -2.64461565
+v 3.00034738 6.25615406 -2.59574175
+vt 0.01817358 0.99998826
+vt 0.98314244 1.00000000
+vt 0.98313928 0.27911577
+vt 1.00000000 0.00005409
+vt 0.00000000 0.00000000
+vt 0.01817393 0.27910399
+f 1/1 2/2 3/3
+f 6/6 4/4 5/5
+f 6/6 1/1 3/3
+f 4/4 6/6 3/3
+
diff --git a/ai_001_008/background_mesh/21.obj b/ai_001_008/background_mesh/21.obj
new file mode 100644
index 0000000000000000000000000000000000000000..36c0f02c4b6a5ace72370fd00544aedec05df670
--- /dev/null
+++ b/ai_001_008/background_mesh/21.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 4.87003040 4.22377062 -0.00082220
+v 4.87003183 4.22708273 -2.31495333
+v 4.69916821 4.22711229 -2.32208776
+v 4.68579721 4.22379112 -0.00082470
+vt 0.00000000 0.99999225
+vt 0.99692649 1.00000000
+vt 1.00000000 0.07257589
+vt 0.00000108 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/22.obj b/ai_001_008/background_mesh/22.obj
new file mode 100644
index 0000000000000000000000000000000000000000..30eb7f8cb111a5ca862ff9522b9d4b7cd9d92980
--- /dev/null
+++ b/ai_001_008/background_mesh/22.obj
@@ -0,0 +1,1585 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
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+f 399/399 90/90 400/400
+f 221/221 367/367 368/368
+f 403/403 488/488 404/404
+f 222/222 221/221 368/368
+f 404/404 172/172 405/405
+f 369/369 222/222 368/368
+f 115/115 405/405 171/171
+f 222/222 369/369 131/131
+f 168/168 115/115 171/171
+f 132/132 444/444 133/133
+f 116/116 407/407 117/117
+f 443/443 133/133 444/444
+f 118/118 409/409 193/193
+f 427/427 140/140 429/429
+f 81/81 193/193 409/409
+f 142/142 427/427 347/347
+f 193/193 81/81 194/194
+f 350/350 347/347 426/426
+f 76/76 194/194 69/69
+f 347/347 350/350 346/346
+f 194/194 76/76 195/195
+f 326/326 346/346 350/350
+f 120/120 76/76 121/121
+f 143/143 346/346 328/328
+f 121/121 76/76 75/75
+f 144/144 328/328 145/145
+f 411/411 121/121 75/75
+f 145/145 328/328 327/327
+f 412/412 411/411 75/75
+f 148/148 145/145 327/327
+f 161/161 412/412 75/75
+f 335/335 148/148 327/327
+f 230/230 412/412 160/160
+f 149/149 148/148 334/334
+f 200/200 160/160 201/201
+f 343/343 149/149 334/334
+f 159/159 201/201 160/160
+f 333/333 343/343 334/334
+f 159/159 202/202 201/201
+f 340/340 342/342 343/343
+f 127/127 63/63 62/62
+f 340/340 420/420 342/342
+f 413/413 155/155 418/418
+f 324/324 342/342 420/420
+f 325/325 418/418 155/155
+f 416/416 324/324 420/420
+f 229/229 227/227 228/228
+f 227/227 229/229 490/490
+f 233/233 234/234 232/232
+f 235/235 236/236 237/237
+f 238/238 239/239 193/193
+f 193/193 240/240 238/238
+f 241/241 242/242 243/243
+f 244/244 245/245 246/246
+f 246/246 189/189 247/247
+f 246/246 248/248 244/244
+f 248/248 246/246 247/247
+f 250/250 251/251 248/248
+f 252/252 253/253 254/254
+f 249/249 255/255 491/491
+f 251/251 492/492 493/493
+f 493/493 248/248 251/251
+f 254/254 256/256 252/252
+f 255/255 251/251 254/254
+f 492/492 251/251 249/249
+f 256/256 254/254 251/251
+f 255/255 249/249 251/251
+f 256/256 258/258 251/251
+f 258/258 259/259 260/260
+f 186/186 187/187 188/188
+f 248/248 189/189 247/247
+f 189/189 248/248 251/251
+f 253/253 256/256 257/257
+f 186/186 258/258 260/260
+f 189/189 251/251 188/188
+f 188/188 258/258 186/186
+f 258/258 188/188 251/251
+f 258/258 256/256 253/253
+f 261/261 255/255 258/258
+f 261/261 494/494 256/256
+f 255/255 261/261 257/257
+f 261/261 256/256 257/257
+f 262/262 263/263 264/264
+f 264/264 265/265 186/186
+f 262/262 256/256 257/257
+f 262/262 264/264 186/186
+f 256/256 262/262 251/251
+f 262/262 186/186 188/188
+f 188/188 251/251 262/262
+f 268/268 266/266 267/267
+f 268/268 265/265 186/186
+f 266/266 268/268 262/262
+f 186/186 262/262 268/268
+f 269/269 270/270 266/266
+f 271/271 272/272 273/273
+f 275/275 281/281 280/280
+f 280/280 279/279 278/278
+f 276/276 273/273 277/277
+f 278/278 276/276 275/275
+f 281/281 275/275 495/495
+f 273/273 276/276 278/278
+f 275/275 280/280 278/278
+f 282/282 283/283 284/284
+f 496/496 302/302 497/497
+f 276/276 275/275 289/289
+f 277/277 290/290 291/291
+f 291/291 263/263 292/292
+f 292/292 293/293 294/294
+f 296/296 498/498 300/300
+f 496/496 499/499 297/297
+f 500/500 501/501 303/303
+f 297/297 500/500 496/496
+f 499/499 497/497 276/276
+f 277/277 291/291 292/292
+f 292/292 294/294 253/253
+f 295/295 296/296 300/300
+f 501/501 500/500 297/297
+f 300/300 276/276 289/289
+f 277/277 292/292 253/253
+f 277/277 295/295 300/300
+f 497/497 499/499 496/496
+f 300/300 289/289 277/277
+f 295/295 277/277 253/253
+f 276/276 300/300 499/499
+f 502/502 288/288 274/274
+f 503/503 275/275 276/276
+f 276/276 298/298 299/299
+f 276/276 296/296 297/297
+f 297/297 285/285 286/286
+f 287/287 503/503 276/276
+f 296/296 276/276 299/299
+f 297/297 286/286 287/287
+f 287/287 276/276 297/297
+f 287/287 275/275 300/300
+f 300/300 301/301 297/297
+f 275/275 287/287 503/503
+f 287/287 300/300 297/297
+f 286/286 307/307 308/308
+f 308/308 304/304 305/305
+f 308/308 306/306 287/287
+f 307/307 286/286 504/504
+f 306/306 308/308 305/305
+f 287/287 286/286 308/308
+f 305/305 309/309 310/310
+f 310/310 311/311 305/305
+f 305/305 312/312 310/310
+f 313/313 314/314 315/315
+f 316/316 317/317 318/318
+f 316/316 319/319 294/294
+f 319/319 316/316 318/318
+f 336/336 337/337 338/338
+f 147/147 344/344 345/345
+f 356/356 355/355 354/354
+f 359/359 353/353 357/357
+f 357/357 358/358 359/359
+f 353/353 359/359 354/354
+f 361/361 352/352 360/360
+f 352/352 361/361 353/353
+f 370/370 371/371 372/372
+f 372/372 373/373 370/370
+f 377/377 378/378 371/371
+f 379/379 380/380 381/381
+f 385/385 386/386 387/387
+f 392/392 393/393 394/394
+f 448/448 446/446 447/447
+f 446/446 448/448 445/445
+f 449/449 450/450 451/451
+f 451/451 452/452 449/449
+
diff --git a/ai_001_008/background_mesh/23.obj b/ai_001_008/background_mesh/23.obj
new file mode 100644
index 0000000000000000000000000000000000000000..5a980b5ef9dc956d2f3f23fe690d91b599a1b876
--- /dev/null
+++ b/ai_001_008/background_mesh/23.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.79791141 0.09641437 -1.20242727
+v 0.10412574 0.09638812 -1.20225799
+v 0.10412610 -0.15402062 -1.20225871
+v 2.79791188 -0.15399437 -1.20242798
+vt 0.00000018 1.00000000
+vt 1.00000000 0.99989516
+vt 0.99999982 0.00000000
+vt 0.00000000 0.00010484
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/24.obj b/ai_001_008/background_mesh/24.obj
new file mode 100644
index 0000000000000000000000000000000000000000..5e9e1a51013c959bd4faaa9b2a13d469d19687d3
--- /dev/null
+++ b/ai_001_008/background_mesh/24.obj
@@ -0,0 +1,22 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.43172455 1.65917408 -2.51438665
+v -3.41758585 1.65917230 -2.59580183
+v -3.46000004 1.65917516 -2.59580231
+v 3.08586216 1.65872717 -2.51429749
+v 3.08586264 1.65872633 -2.59571290
+v 3.00038600 1.65873206 -2.60448289
+v -3.43172359 1.65917325 -2.59580207
+vt 0.00098864 0.00431960
+vt 0.90374202 0.00647954
+vt 0.90374726 0.00000000
+vt 0.00000000 0.99999994
+vt 0.90275598 1.00000000
+vt 1.00000000 0.98694193
+vt 0.90374464 0.00431974
+f 1/1 2/2 3/3
+f 4/4 5/5 6/6
+f 6/6 7/7 1/1
+f 1/1 4/4 6/6
+
diff --git a/ai_001_008/background_mesh/25.obj b/ai_001_008/background_mesh/25.obj
new file mode 100644
index 0000000000000000000000000000000000000000..7b788ff6ded8b550960b6e4c391e7772535bfbf8
--- /dev/null
+++ b/ai_001_008/background_mesh/25.obj
@@ -0,0 +1,17 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.74305820 0.11644849 -0.06066856
+v -0.00342625 0.12369278 -0.06064506
+v -0.00342476 0.01046098 -0.06064974
+v 2.78552103 -0.00401408 -0.06067390
+v 2.78552055 0.11644890 -0.06066892
+vt 0.01522540 0.94327408
+vt 1.00000000 1.00000000
+vt 0.99999946 0.11334595
+vt 0.00000000 0.00000000
+vt 0.00000017 0.94327730
+f 1/1 2/2 3/3
+f 1/1 4/4 5/5
+f 4/4 1/1 3/3
+
diff --git a/ai_001_008/background_mesh/26.obj b/ai_001_008/background_mesh/26.obj
new file mode 100644
index 0000000000000000000000000000000000000000..08e7b7248c7bea07adc7ab63fd8194c92ee8d327
--- /dev/null
+++ b/ai_001_008/background_mesh/26.obj
@@ -0,0 +1,20 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -0.98419231 0.02477277 -0.00115126
+v -0.98419005 0.02477343 -0.06064086
+v -0.98418969 -0.00405085 -0.06840909
+v -0.98416859 -0.00405270 -0.63204491
+v -0.98416817 -0.21227685 -0.63204473
+v -0.98419189 -0.21227476 0.00204536
+vt 0.00504128 0.99999726
+vt 0.09886009 1.00000000
+vt 0.11111107 0.87840438
+vt 1.00000000 0.87839651
+vt 0.99999970 0.00000000
+vt 0.00000000 0.00000880
+f 1/1 2/2 3/3
+f 3/3 4/4 5/5
+f 6/6 1/1 3/3
+f 3/3 5/5 6/6
+
diff --git a/ai_001_008/background_mesh/27.obj b/ai_001_008/background_mesh/27.obj
new file mode 100644
index 0000000000000000000000000000000000000000..ee997b4f834c1847efcad6e877dbd87ca33d7e38
--- /dev/null
+++ b/ai_001_008/background_mesh/27.obj
@@ -0,0 +1,17 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 0.32591474 0.11642231 -0.85380810
+v 0.32591927 0.09639075 -1.05648339
+v 0.32588920 -0.15401797 -1.05648327
+v 0.32587779 -0.15401687 -0.72351688
+v 0.32590786 0.09639186 -0.72351688
+vt 0.39130428 1.00000000
+vt 1.00000000 0.92592978
+vt 0.99999964 0.00000000
+vt 0.00000000 0.00000408
+vt 0.00000000 0.92593396
+f 1/1 2/2 3/3
+f 1/1 4/4 5/5
+f 4/4 1/1 3/3
+
diff --git a/ai_001_008/background_mesh/28.obj b/ai_001_008/background_mesh/28.obj
new file mode 100644
index 0000000000000000000000000000000000000000..2f903963a8d74157f448607c31de894c33fe0bc9
--- /dev/null
+++ b/ai_001_008/background_mesh/28.obj
@@ -0,0 +1,55 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.70094800 6.41773272 -0.00080800
+v -3.70097709 6.41773272 -2.59583426
+v -3.70091128 4.09663963 -2.59582043
+v -3.70088220 4.09663963 -0.00094601
+v -3.70087123 3.68620133 -0.06046658
+v -3.70087314 3.75696635 -0.06046366
+v -3.70087481 3.79846787 -0.09699440
+v -3.70087647 3.87018991 -0.06045897
+v -3.70090318 3.87019134 -2.46054649
+v -3.70089269 3.51636624 -2.43224049
+v -3.70086646 3.51636481 -0.06047360
+v -3.70087028 2.65303278 -2.59581184
+v -3.70090294 3.79845953 -2.60207653
+v -3.70090222 3.79845977 -2.53131151
+v -3.70090127 3.77112031 -2.51440310
+v -3.70089102 3.40580225 -2.53131151
+v -3.70086241 3.40583658 0.00207675
+v -3.70076561 -0.00773215 -0.00119004
+v -3.70079517 -0.00408568 -2.60207653
+vt 0.00110775 1.00000000
+vt 0.99760294 1.00000000
+vt 0.99759763 0.63876659
+vt 0.00116076 0.63876659
+vt 0.02401674 0.57488972
+vt 0.02401564 0.58590293
+vt 0.03804352 0.59236181
+vt 0.02401386 0.60352397
+vt 0.94565219 0.60352421
+vt 0.93478262 0.54845816
+vt 0.02401944 0.54845792
+vt 0.99759436 0.41409689
+vt 1.00000000 0.59236056
+vt 0.97282606 0.59236056
+vt 0.96633333 0.58810574
+vt 0.97282606 0.53125095
+vt 0.00000000 0.53125632
+vt 0.00125446 0.00000000
+vt 1.00000000 0.00056749
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+f 5/5 6/6 7/7
+f 7/7 8/8 9/9
+f 7/7 10/10 11/11
+f 11/11 5/5 7/7
+f 10/10 7/7 9/9
+f 12/12 19/19 18/18
+f 12/12 17/17 16/16
+f 13/13 15/15 14/14
+f 16/16 13/13 12/12
+f 17/17 12/12 18/18
+f 15/15 13/13 16/16
+
diff --git a/ai_001_008/background_mesh/29.obj b/ai_001_008/background_mesh/29.obj
new file mode 100644
index 0000000000000000000000000000000000000000..d02dd88b9f90a31cc443c6d1a2ac0f4b20d5805f
--- /dev/null
+++ b/ai_001_008/background_mesh/29.obj
@@ -0,0 +1,27 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.89971805 -0.00401499 -0.67400002
+v 2.89971519 0.09641711 -0.67400032
+v 2.89971495 0.09641701 -0.70200026
+v 2.89971638 0.03599981 -0.73514390
+v 2.89972210 0.09641909 -0.07199985
+v 2.89971519 0.09641711 -0.67400020
+v 2.89972353 -0.00401337 -0.18399985
+v 2.89972472 0.00799952 -0.06067437
+v 2.89971805 -0.00401499 -0.67399997
+vt 0.90934521 0.00000000
+vt 0.90934569 0.99998027
+vt 0.95085967 0.99997932
+vt 1.00000000 0.39841849
+vt 0.01679168 1.00000000
+vt 0.90934551 0.99998027
+vt 0.18284810 0.00001606
+vt 0.00000000 0.11962578
+vt 0.90934515 0.00000000
+f 9/9 2/2 3/3
+f 3/3 4/4 9/9
+f 7/7 6/6 1/1
+f 5/5 7/7 8/8
+f 6/6 7/7 5/5
+
diff --git a/ai_001_008/background_mesh/3.obj b/ai_001_008/background_mesh/3.obj
new file mode 100644
index 0000000000000000000000000000000000000000..56fa9290ba9499a90ade691ed5d8efc2cd7a1518
--- /dev/null
+++ b/ai_001_008/background_mesh/3.obj
@@ -0,0 +1,55 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 4.69913387 6.20768356 -2.51430297
+v 4.69924259 6.20768356 -0.00070656
+v 4.69926882 4.22378540 0.00209189
+v 4.69916868 4.20819235 -2.31495833
+v 4.69920874 1.21719909 -2.30938673
+v 4.69930696 1.23135555 -0.02636683
+v 4.69930792 1.21604586 -0.00100335
+v 4.69932413 -0.01768351 -0.00107670
+v 4.69921494 -0.00400354 -2.52209091
+v 4.69925117 3.88203430 -0.50841868
+v 4.69927311 3.88203454 -0.00084484
+v 4.69927645 3.64095926 -0.00085917
+v 4.69925451 3.64096069 -0.50841868
+v 4.69925547 3.68350315 -0.48005712
+v 4.69928074 2.12361622 -0.36661077
+v 4.69927740 2.37887049 -0.36661077
+v 4.69927979 2.37887049 -0.30988753
+v 4.69928408 2.05271244 -0.30988753
+v 4.69928169 2.05271244 -0.36661077
+vt 0.00308533 1.00000000
+vt 0.99889129 1.00000000
+vt 1.00000000 0.68132031
+vt 0.08205926 0.67881554
+vt 0.08426655 0.19836302
+vt 0.98872554 0.20063701
+vt 0.99877381 0.19817777
+vt 0.99874473 0.00000000
+vt 0.00000000 0.00219746
+vt 0.79775208 0.62642378
+vt 0.99883652 0.62642378
+vt 0.99883085 0.58769912
+vt 0.79775208 0.58769935
+vt 0.80898803 0.59453309
+vt 0.85393190 0.34396362
+vt 0.85393190 0.38496590
+vt 0.87640375 0.38496590
+vt 0.87640375 0.33257413
+vt 0.85393190 0.33257413
+f 4/4 2/2 3/3
+f 8/8 6/6 7/7
+f 5/5 8/8 9/9
+f 2/2 4/4 1/1
+f 8/8 5/5 6/6
+f 9/9 1/1 4/4
+f 4/4 5/5 9/9
+f 14/14 11/11 12/12
+f 13/13 14/14 12/12
+f 11/11 14/14 10/10
+f 15/15 16/16 17/17
+f 15/15 18/18 19/19
+f 18/18 15/15 17/17
+
diff --git a/ai_001_008/background_mesh/30.obj b/ai_001_008/background_mesh/30.obj
new file mode 100644
index 0000000000000000000000000000000000000000..f5f8fe4bf9ecb8d4ece76ca07dbd80ea0d0d6f51
--- /dev/null
+++ b/ai_001_008/background_mesh/30.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.91980958 0.11645039 -0.00772728
+v 2.91980934 0.09818176 -0.06067081
+v 2.91981363 -0.05181770 -0.06067701
+v 2.91981435 -0.05181941 -0.00110287
+vt 0.11119606 1.00000000
+vt 0.99989593 0.89143252
+vt 1.00000000 0.00001014
+vt 0.00000000 0.00000000
+f 4/4 2/2 3/3
+f 2/2 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/31.obj b/ai_001_008/background_mesh/31.obj
new file mode 100644
index 0000000000000000000000000000000000000000..40bc5eb69805fe0daacaf121beb8f894ca6734ab
--- /dev/null
+++ b/ai_001_008/background_mesh/31.obj
@@ -0,0 +1,26 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.70088911 3.40580440 -2.38028288
+v -3.69375134 3.40582657 -0.73525411
+v -3.70086336 3.40583539 -0.08299422
+v -3.72211289 3.40583634 -0.06047799
+v -3.70086265 3.40583634 -0.01209044
+v -4.00572920 3.40584612 -0.00099121
+v -4.00572824 3.40581203 -2.51440525
+v -3.72211266 3.40580320 -2.51440120
+vt 0.05336263 0.97712088
+vt 0.70786238 1.00000000
+vt 0.96737391 0.97720343
+vt 0.97633237 0.90909111
+vt 0.99558407 0.97720569
+vt 1.00000000 0.00000000
+vt 0.00000000 0.00000306
+vt 0.00000161 0.90909189
+f 6/6 2/2 3/3
+f 4/4 5/5 6/6
+f 1/1 7/7 8/8
+f 7/7 1/1 2/2
+f 3/3 4/4 6/6
+f 2/2 6/6 7/7
+
diff --git a/ai_001_008/background_mesh/32.obj b/ai_001_008/background_mesh/32.obj
new file mode 100644
index 0000000000000000000000000000000000000000..fb764eaa9b75cec1cae5f1304fa5c7d33cab475f
--- /dev/null
+++ b/ai_001_008/background_mesh/32.obj
@@ -0,0 +1,20 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -3.70088577 4.10337448 -0.28571343
+v -3.68785715 4.10345078 -2.51440477
+v -3.70091200 4.10345411 -2.61428666
+v -4.00214338 4.10343599 -2.59582448
+v -4.00214338 4.10334730 -0.00094969
+v -3.70088220 4.10336399 0.01428664
+vt 0.11413038 0.95854539
+vt 0.96200138 1.00000000
+vt 1.00000000 0.95846194
+vt 0.99297637 0.00000000
+vt 0.00579644 0.00000000
+vt 0.00000000 0.95855677
+f 4/4 2/2 3/3
+f 1/1 4/4 5/5
+f 5/5 6/6 1/1
+f 4/4 1/1 2/2
+
diff --git a/ai_001_008/background_mesh/4.obj b/ai_001_008/background_mesh/4.obj
new file mode 100644
index 0000000000000000000000000000000000000000..07a4617cff6d04d908140c4db9a2defda0786957
--- /dev/null
+++ b/ai_001_008/background_mesh/4.obj
@@ -0,0 +1,14 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 4.94923592 4.28306770 -2.31494999
+v 4.94933605 4.28306770 -0.00081760
+v 4.94937754 1.13693094 -0.00100466
+v 4.94927740 1.13693237 -2.31499863
+vt 0.00002102 1.00000000
+vt 1.00000000 1.00000000
+vt 0.99991924 0.00000000
+vt 0.00000000 0.00000045
+f 1/1 2/2 3/3
+f 3/3 4/4 1/1
+
diff --git a/ai_001_008/background_mesh/5.obj b/ai_001_008/background_mesh/5.obj
new file mode 100644
index 0000000000000000000000000000000000000000..4512744bdf4a052d3c7780ebe247102de4f9ae49
--- /dev/null
+++ b/ai_001_008/background_mesh/5.obj
@@ -0,0 +1,1870 @@
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diff --git a/ai_001_008/background_mesh/6.obj b/ai_001_008/background_mesh/6.obj
new file mode 100644
index 0000000000000000000000000000000000000000..7107320df1afc3cf8fca7b42168c776063c78a9c
--- /dev/null
+++ b/ai_001_008/background_mesh/6.obj
@@ -0,0 +1,31 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v 2.90207338 0.09641539 -1.20243382
+v 2.89972210 0.09641915 -0.05500001
+v -0.01207316 0.09639075 -0.06064612
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+v 2.56256104 0.09641363 -0.73514885
+v 0.32743895 0.09639183 -0.73517942
+v 0.32591936 0.09639075 -1.05939186
+vt 0.01083334 1.00000000
+vt 1.00000000 0.99919313
+vt 0.99513257 0.00000000
+vt 0.00000000 0.00295022
+vt 0.13414666 0.71844655
+vt 0.13414492 0.88517034
+vt 0.41366503 0.88349509
+vt 0.41363868 0.11650482
+vt 0.13414532 0.11598338
+f 1/1 6/6 5/5
+f 7/7 6/6 1/1
+f 4/4 1/1 5/5
+f 7/7 1/1 2/2
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+f 8/8 7/7 2/2
+f 8/8 4/4 9/9
+f 8/8 2/2 3/3
+f 4/4 8/8 3/3
+
diff --git a/ai_001_008/background_mesh/7.obj b/ai_001_008/background_mesh/7.obj
new file mode 100644
index 0000000000000000000000000000000000000000..f21d0e75b7ee65da54c67758b21dad50db46941a
--- /dev/null
+++ b/ai_001_008/background_mesh/7.obj
@@ -0,0 +1,399 @@
+# https://github.com/mikedh/trimesh
+mtllib material.mtl
+usemtl material_0
+v -0.00352062 -0.00404858 -2.28101611
+v -0.00347584 -0.00404517 -1.24581754
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--- /dev/null
+++ b/ai_001_008/background_mesh/8.obj
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+# https://github.com/mikedh/trimesh
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--- /dev/null
+++ b/ai_001_008/background_mesh/9.obj
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+# https://github.com/mikedh/trimesh
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