Papers by Darwyn Peachey

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Texture On Demand

Darwyn Peachey
January 1990

Texture On Demand (TOD) is a technique for organizing large amounts of stored texture data in disk files and accessing it efficiently. Simply reading entire texture images into memory is not a good solution for real memory systems or for virtual memory systems. Texture data should be read from disk files only on ... more

Paper (PDF)

Available as Pixar Technical Memo #217

Simulating Whitewater Rapids in Ratatouille

Eric Froemling, Tolga Goktekin, Darwyn Peachey
May 2007

In Pixar's Ratatouille, a key story point involves a rat being swept through the sewers of Paris, plummeting down waterfalls and along steeply sloping tunnels, through a series of high-speed S- bends which cause the torrent of water to bank up sharply on each turn. Bringing ... more

Paper (PDF)

Available as Pixar Technical Memo #07-03

An Effects Recipe for Rolling Dough, Cracking Eggs and Pouring Sauce

Tolga Goktekin, Jon Reisch, Darwyn Peachey, Apurva Shah
May 2007

Creating the digital effects for cooking in Ratatouille posed a number of unique challanges. First we had to adopt efficient methods for simulating a wide variety of material behaviours. Second we needed to direct our simulations in order to match the expressiveness of the character's animation, e.g. forming specific shapes while the character pounds a ... more

Paper (PDF)

Available as Pixar Technical Memo #07-06

Into the Voyd: Teleportation of Light Transport in Incredibles 2

Patrick Coleman, Darwyn Peachey, Tom Nettleship, Ryusuke Villemin, Tobin Jones
August 2018

In Incredibles 2, a character named Voyd has the ability to create portals that connect two locations in space. A particular challenge for this film is the presence of portals in a number of fast-paced action sequences with multiple characters and objects passing through them, causing multiple views of ... more

Paper (PDF)

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