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width="743" border="0">       <tr>          <td width="62">&nbsp;</td>         <td width="671"> <table width="100%" border="0">             <tr>                <td><p>Star Wars, Spiderman, Ice Age...SGI et ses partenaires ont                    une fois encore triomph aux Oscars dans le domaine des effets                    spciaux. </p>                 <p>Depuis 8 ans, chaque film nomin aux Oscars a fait appel                     la technologie SGI,  lorigine dimages aussi inoubliables                    que la splendide Rome antique ramene  la vie, les apparitions                    et disparitions plus vraies que nature de lhomme invisible                    ou la mer dchane sur un chalutier au large de la cte est                    des Etats-Unis. Les scnes sensationnelles de Gladiator, Hollow                    Man-Lhomme invisible et En Pleine Tempte nauraient vu le                    jour sans les effets spciaux raliss respectivement par les                    socits The Mill Film Ltd., Sony Pictures Imageworks (SPI),                    Tippett Studios, et Industrial Light & Magic (ILM), partenaires                    de choix de SGI. </p></td>             </tr>           </table>           <p>&nbsp;</p>           <table width="100%" border="0">             <tr>                <td width="72%"><p><strong>Gladiator</strong>. John Nelson (La Cit                    des Anges), superviseur des effets spciaux de la socit londonienne                    The Mill Film Ltd et son quipe ont relev un vritable dfi                    lanc par Ridley Scott ralisateur du film  grand spectacle                    Gladiator. Comment recrer la grandeur de Rome sans ruiner le                    studio ? Lide dutiliser la technologie numrique sur matriel                    SGI a permis de concevoir des visuels grandioses, qui ont obtenu                    une nomination aux Oscars.  Rome au temps de lempire tait                    une ville imposante, qui comptait un million dhabitants. Il                    a fallu attendre 1 000 ans pour quune autre ville atteigne                    ce niveau de population  affirme Nelson. Mme dans les scnes                    tournes en extrieur, la technologie SGI est trs prsente                    : les stations Silicon Graphics O2 pour la prvisualisation                    de plateau, les systmes O2 et Octane 2 pour la programmation                    et lanimation en 3D. Ainsi, lquipe de Nelson a cr les squences                    piques qui redonnent vie  la Rome antique, grouillant de dizaines                    de milliers de personnes. Ces images complexes ont t calcules                    sur un Render Farm de petite taille constitu de 10 ordinateurs                    biprocesseurs SGI Origin et de 10 ordinateurs biprocesseurs                    Linux 500 Mhz. Au del des effets spciaux notre premier objectif                    a t dapporter des lments nouveaux  la comprhension de                    cette priode de lhistoire. Un vritable dfi a t relev                    sur le plan logistique avec la scne de guerre qui ouvre Gladiator,                    re-cration grandiose dun combat entre les lgions romaines                    emmenes par le Gnral Maximus (Russell Crowe) et les guerriers                    allemands. Il sagissait de montrer la supriorit technologique                    de la machine de guerre romaine et lampleur de la bataille                    avec seulement 1 500 figurants, alors que 10 000 soldats taient                    supposs se battre , prcise Nelson. Pour que cette bataille                    soit plus vraie que nature, Nelson a cr un panoramique spectaculaire                    du champ de bataille  partir de trois prises de vues fixes,                    en utilisant Discreet Flame sur stations Silicon Graphics Octane2                    et de Discreet Inferno sur serveurs SGI Origin. Ces trois scnes                    ont ensuite t rassembles pour ne former quun seul panorama                    sur lequel on a incorpor un dcor virtuel.  Nous avons fait                    plusieurs prises de vue sur chacune des trois scnes. Nous avons                    film les Romains en arrire-plan, en plan central et au premier                    plan. Puis, nous avons ajout des couches de Romains marchant                    en cadence. Ensuite, nous avons ajout les Allemands en arrire-plan,                     gauche et  droite, et film sparment les explosions pyrotechniques                    parmi les Allemands, sans quun seul acteur ne soit prsent.                    Tous ces lments ont t synchroniss pour crer un panoramique                    virtuel. Flches enflammes, boules de feu, et toute la puissance                    de feu qui accompagne la progression de larme romaine ont                    galement ajouts  explique Nelson. </p></td>               <td width="28%"><div align="center">                    <p align="right"><img src="http://www.sgisilic.alias.domicile.fr/sgimag/Images/oscar2.jpg" width="170" height="109"></p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right">&nbsp;</p>                   <p align="right"><img src="http://www.sgisilic.alias.domicile.fr/sgimag/Images/oscar1.jpg" width="170" height="114"></p>                 </div></td>             </tr>           </table>           <p>&nbsp;</p>           <table width="100%" border="0">             <tr>                <td width="30%"><blockquote>                    <p align="left"></div>                  </blockquote>                 <div align="center">                    <p align="left"><img src="http://www.sgisilic.alias.domicile.fr/sgimag/Images/oscar3.jpg" width="170" height="109"></p> 				  <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left">&nbsp;</p>                   <p align="left"><img src="http://www.sgisilic.alias.domicile.fr/sgimag/Images/oscar4.jpg" width="170" height="197"></p>                 </div></td>               <td width="70%"><strong>Hollow Man, lHomme invisible.</strong>                  Ladaptation post-moderne par Paul Verhoeven du roman de H.G.                  Wells met en scne un tre numrique (mais invisible), grce aux                  talents des socits SPI et Tippett Studio, dj  lorigine des                  effets spciaux de Starship Troopers de Verhoeven, film nomin                  aux Oscars. Il sagit de la transformation visible/invisible la                  plus russie de lhistoire du cinma. Au lieu de crer un effet                  dinvisibilit traditionnel, Scott Anderson dImageworks a convaincu                  Verhoeven de laisser le jeu de Kevin Bacon inspirer la cration                  des gags dinvisibilit labors. Bacon a donc particip  chaque                  prise, vtu de costumes bleus, verts ou noirs et maquill, de                  faon  pouvoir ensuite tre effac, en laissant son alter ego                  invisible semer la panique. La Recherche & Dveloppement sur Hollow                  Man a dbut mi-1998. Anderson et son quipe de 150 personnes                  ont rapidement ralis que pour crer un personnage invisible                   lcran, il fallait partir de zro et construire un tre 100                  % numrique. Pour ces animations stupfiantes, SPI a utilis le                  logiciel Maya d Alias|Wavefront. Le compositing a t ralis                  sur les stations Silicon Graphics Octane, O2 et sur les systmes                  Silicon Graphics Onyx. Pour donner vie  un Kevin Bacon invisible,                  dont la silhouette nest rvle que par des lments tels que                  la fume, le feu, leau et le sang, la socit Tippett Studio                  a principalement travaill sur Maya et Renderman, ainsi que sur                  des outils maison. Les images de Tippett et de SPI ont t calcules                  sur les serveurs SGI Origin. Anderson explique :  Nous avons                  pris les meilleurs procds mdicaux, les avons appliqus  nos                  besoins et utilis des logiciels adapts pour grer ces procds.                  Mais la mthode en elle-mme nous appartient compltement. Nous                  avons crit de nombreuse pages de programmes pour raliser tous                  les effets spciaux : suppression/intgration de Kevin,animation,                  structure des formes humaines. Ces oprations devaient donner                  limpression dun procd compltement naturel. Le film explore                  la transformation presque comme une tude scientifique o le spectateur                  est tmoin du processus de transformation du corps, du visible                   linvisible. Il ntait pas vident de raliser un travail trs                  complexe, qui, au final, ressemble  un fondu enchan. Paul voulait                  que le corps de Kevin se dissolve dune manire logique et lgante.                  Cest pourquoi nous avons fait disparatre sparment chaque partie                  de son anatomie. Auparavant, personne navait travaill de A                   Z sur un tre dynamique dou de sensations. Cest sans aucun doute                  le film le plus complexe sur lequel jai travaill . </td>             </tr>           </table>           <p>&nbsp;</p>           <table width="100%" border="0">             <tr>                <td width="72%"><p><strong>En Pleine Tempte.</strong> Cette reconstitution                    par Wolfgang Petersen de la vritable histoire du malheureux                    chalutier Andrea Gail ncessitait une matrise irrprochable                    de la fureur des lments. Cest ce quil y a de plus difficile                     imiter en effets spciaux. En utilisant la dynamique des fluides,                    la simulation par ordinateur sophistique des phnomnes naturels,                    ILM a reproduit en numrique les montagnes deau nes de la                    rencontre fatale de trois systmes climatiques. Les animateurs                    ont travaill sur des stations Silicon Graphics O2 puis calcul                    les images sur des systmes SGI Origin. Rsultat : une apocalypse                    numrique en haute mer, sans doute la scne de tempte la plus                    spectaculaire de lhistoire du cinma. ILM ne sest pas contente                    de raliser la simulation. Stefen Fangmeier (nomin pour Twister),                    superviseur des effets spciaux et spcialiste des conditions                    mto extrmes chez ILM , explique :  Ce nest pas comme cela                    quon ralise une scne dans un grand film. Sur la crte des                    normes rouleaux, nous avons appliqu diverses techniques pour                    crer des vaguelettes de 60  90 cm. Dans la ralit, cest                    le genre de vagues qui sont prsentes sur les vagues gigantesques                    de 25 mtres. De plus, nous avons labor 5 ou 6 niveaux de                    simulation de particule afin de simuler lcume et leffet du                    vent. Il ntait pas possible de prendre des textures statiques                    et de les appliquer sur nos vagues car tout devait bouger au                    rythme de locan, ce qui compliquait considrablement les choses                    . </p></td>               <td width="28%"><div align="right"><img src="http://www.sgisilic.alias.domicile.fr/sgimag/Images/oscar5.jpg" width="169" height="109"></div></td>             </tr>           </table>           <p>&nbsp;</p>           <table width="100%" border="0">             <tr>                <td>Pour plus dinformations : <a href="www.sgi.com/features/2001/mar/oscar">www.sgi.com/features/2001/mar/oscar</a>                </td>             </tr>           </table>           <p>&nbsp;</p>           </td>       </tr>     </table>     <p>&nbsp;</p>     <p>        <!-- Content ends here -->       </DIV> </TD><TD  WIDTH="20" VALIGN="TOP"><IMG SRC="/images/dots/dot_clear.gif" WIDTH="20" HEIGHT="1" ALT=""></TD><TD  WIDTH="50" VALIGN="TOP"><IMG 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