[jitter] depth message wouldn't resolve trails ?

Hello,

I have these inexpected trails, 
Could you point me the way to remove them ?

thank you.

max v2;
#N vpatcher 163 71 1065 589;
#P origin 0 21;
#P toggle 510 232 15 0;
#P window setfont "Sans Serif" 9.;
#P message 510 255 81 196617 depth_enable \$1;
#P toggle 562 323 15 0;
#P message 562 346 81 196617 depth_enable \$1;
#P flonum 475 326 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P message 475 347 82 196617 color 1. 1. 1. \$1;
#P toggle 732 301 17 0;
#P toggle 752 338 17 0;
#P toggle 711 337 17 0;
#P newex 670 358 89 196617 pak poly_mode 0 0;
#P newex 408 328 29 196617 r b2;
#P newex 381 229 29 196617 r b1;
#P newex 107 111 29 196617 s b1;
#P newex 71 111 29 196617 s b2;
#P window linecount 3;
#P newex 408 381 336 196617 jit.gl.gridshape bulle @shape sphere @scale 0.5 0.5 0.5 @blend_enable 1 @smooth_shading 1 @lighting_enable 1 @automatic 0 @depth_enable 1 @color 1. 1. 1. 0.35;
#P toggle 450 238 15 0;
#P window linecount 1;
#P message 450 256 53 196617 enable \$1;
#P message 531 98 30 196617 read;
#P newex 619 234 47 196617 gate 1 1;
#N vpatcher 460 63 588 255;
#P outlet 32 74 15 0;
#P inlet 36 41 15 0;
#P connect 0 0 1 0;
#P pop;
#P newobj 656 209 13 196617 p;
#P flonum 689 37 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 784 168 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 748 168 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 712 168 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P newex 679 189 112 196617 pak rotatexyz 0. 0. 0.;
#P flonum 743 71 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 705 71 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 665 71 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P newex 640 98 85 196617 pak scale 1. 1. 1.;
#P flonum 762 119 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 724 119 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P flonum 684 119 35 9 0 0 0 3 0 0 0 221 221 221 222 222 222 0 0 0;
#P newex 656 143 95 196617 pak position 0. 0. 0.;
#P message 201 80 34 196617 reset;
#P toggle 182 109 15 0;
#P newex 182 129 47 196617 gate 1 1;
#P window linecount 2;
#P newex 201 98 189 196617 jit.gl.handle bulle @inherit_transform 1 @visible 0;
#P window linecount 1;
#P newex 415 280 405 196617 jit.gl.videoplane bulle @texture tex1 @automatic 0 @scale 0.2 0.2 0.2 @depth_enable 1;
#P newex 406 151 151 196617 jit.gl.texture bulle @name tex1;
#P message 479 106 29 196617 stop;
#P message 445 106 33 196617 start;
#P newex 445 86 41 196617 sel 1 0;
#P newex 404 128 167 196617 jit.qt.movie 320 240 @autostart 0;
#P message 523 79 76 196617 read bball.mov;
#P message 53 175 192 196617 name bulle \, size 320 240 \, depthbuffer 1;
#P user jit.pwindow 52 201 322 242 0 1 0 0 1 1;
#X name bulle;
#P newex 57 149 89 196617 jit.gl.render bulle;
#P newex 57 85 115 196617 t b b b erase;
#P toggle 57 37 15 0;
#P newex 57 61 57 196617 qmetro 20;
#P connect 5 0 4 0;
#P connect 1 0 0 0;
#P connect 0 0 2 0;
#P fasten 14 0 3 0 187 146 62 146;
#P connect 2 3 3 0;
#P connect 2 0 3 0;
#P connect 2 1 36 0;
#P connect 2 2 37 0;
#P connect 15 0 14 0;
#P connect 16 0 13 0;
#P connect 13 0 14 1;
#P fasten 0 0 7 0 62 80 409 80;
#P fasten 6 0 7 0 528 124 409 124;
#P fasten 9 0 7 0 450 122 409 122;
#P fasten 10 0 7 0 484 122 409 122;
#P fasten 32 0 7 0 536 127 409 127;
#P connect 7 0 11 0;
#P fasten 46 0 35 0 567 371 413 371;
#P fasten 44 0 35 0 480 371 413 371;
#P connect 39 0 35 0;
#P fasten 40 0 35 0 675 378 413 378;
#P fasten 48 0 12 0 515 275 420 275;
#P fasten 33 0 12 0 455 274 420 274;
#P fasten 31 0 12 0 624 274 420 274;
#P connect 38 0 12 0;
#P fasten 1 0 8 0 62 55 450 55;
#P connect 8 0 9 0;
#P connect 34 0 33 0;
#P connect 45 0 44 0;
#P fasten 8 1 10 0 465 104 484 104;
#P connect 49 0 48 0;
#P connect 47 0 46 0;
#P fasten 21 0 30 0 645 191 661 191;
#P fasten 25 0 30 0 684 207 661 207;
#P connect 17 0 30 0;
#P connect 30 0 31 1;
#P connect 29 0 22 0;
#P connect 22 0 21 1;
#P connect 18 0 17 1;
#P fasten 23 0 21 2 710 92 695 92;
#P connect 29 0 23 0;
#P connect 41 0 40 1;
#P fasten 43 0 41 0 737 326 716 326;
#P fasten 19 0 17 2 729 138 717 138;
#P connect 26 0 25 1;
#P fasten 24 0 21 3 748 92 720 92;
#P fasten 20 0 17 3 767 138 745 138;
#P connect 29 0 24 0;
#P connect 27 0 25 2;
#P connect 42 0 40 2;
#P fasten 43 0 42 0 737 327 757 327;
#P connect 28 0 25 3;
#P pop;
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