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vendredi 13 novembre 2009

District 9 - Render Passes

Notre confrère CgSociety.org propose un papier sur le workflow utilisé pour la post-production du film District 9, avec images, textes, et vidéos à l'appui, montrant précisément les passes de rendu utilisées pour atteindre un degré de réalisme avancé.

Extrait en anglais : "Julianna Kolakis first worked on the look development of Christopher and little CJ with James as well as the look dev lead Joe Eveleigh, the lead lighter Robert Bourgeault, and later Anna Ivanova, the second texture artist who came aboard to help with maps for the aliens and other models. The artists all contributed to the character development gathering references and giving artistic feedback on how materials such as the skin, shells, and tentacles should look.

"There were 2026 texture maps for a variety of adult aliens (excluding clothes), and each model had 21 UV maps at 4096 pixels," explains Kolakis. "These maps included colors, bumps, displacements, various specs, wet specs, roughness, masks, multiple subsurface, and reflections for materials such as the shell, skin, eyes, fur, bruising, blood, dirt, dust, war paint, and stickers."

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mercredi 28 octobre 2009

The Embassy's VFX Work on District 9

The Embassy team worked on 109 shots for District 9, including the scorpion-like alien creature scenes and the sequences in which lead character Wikis is forced to use alien weaponry to blow up various objects. While all of the sequences required varied cameras and visual effects to drive home the authentic feel, the Exo-suit sequences stand out as a distinguishing use of vfx software to further the perceived reality of the film.



To start, CG Leads Matt Rouleau, Simon Van de Lagemaat and their team built and animated the Exo-suit in XSI and then rendered it in mental ray. The surfacing and texture painting was done in Zbrush and Modo, then it was composited and GenArts Sapphire plug-ins were added. Stephen Pepper, The Embassy's compositing supervisor for District 9 said details created with GenArts Sapphire were integral to achieving the film's convincing visual effects. Read more