Making Movies CS 445/645 Fall 2001

Assignment 4, part 2 n How is this done in hardware? –Interpolate reflection vectors across polygon surface –Compute cube environment intersection for each relection vector –Assign polygon texture according to cube face texture map

Assignment 4, part 2 n How is this different from what we do –We compute texture vertices and linearly interpolate across texture –Which is faster?

Extra Credit Assignment n Write a ray tracer from scratch –IMPORTANT – DON’T USE THE WEB FOR THIS ASSIGNMENT! n Archaeologists found this relic from my 1993 ray tracing assignment

Raytracer Specs n Render 6 polygons and 6 spheres n Use multiple colors n Specular and diffuse lighting effects n Must demonstrate object -> object shadows –Sphere to sphere –Sphere to polygon –Polygon to sphere –Polygon to polygon

Making Movies n Concept n Storyboarding n Sound n Character Development n Layout and look n Effects n Animation n Lighting

Concept n Pixar’s Lasseter is a genius – “Nothing gets in the way of the story”

Storyboarding n Explicitly define –Scenes –Camera shots –Special effects –Lighting –Scale n Used as guide by animators

Sound n Voice recording of talent completed before animation begins n Animations must match the voice over n A puppeteer once told me that the voice makes or breaks a character

Character Development n 300 Drawings

Character Development n 40 Sculptures

Character Development n Computer Models

Layout and Look n Build scenery n Match colors

Matchmoving n CG camera must exactly match the real camera –Position –Rotation –Focal length –Aperature n Easy when camera is instrumented n Hard to place CG on moving objects on film

Matchmoving

Matchmoving n Square patterns in live action made it easier to track – furniture, wall paper n 2D – 3D conversion in Maya

Water

Particle Sim and Indentation

Tools

Compositing

Compositing n Lighting

Facial Animation

Fur

Cloth

Buttons and Creases

Texture

Companies n Pixar n Disney n Sony Imageworks n Industrial Light and Magic (ILM) n Rhythm and Hues n Pacific Data Images (PDI) n Dreamworks SKG n Tippett Studios n Angel Studios n Blue Sky n Robert Abel and Associates n Giant Studios

Toy Story (1995) n 77 minutes long; 110,064 frames n 800,000 machine hours of rendering n 1 terabyte of disk space n 3.5 minutes of animation produced each week (maximum) n Frame render times: 45 min – 20 hours n 110 Suns operating 24-7 for rendering –300 CPU’s

Toy Story n Texture maps on Buzz: 189 –(450 to show scuffs and dirt) n Number of animation ‘knobs’ –Buzz – 700 –Woody – 712 n Face – 212 n Mouth – 58 –Sid’s Backpack - 128

Toy Story n Number of leaves on trees – 1.2 mil n Number of shaders – 1300 n Number of storyboards – 25,000

Toy Story 2 n 80 minutes long, 122,699 frames n 1400 processor renderfarm n Render time of 10 min to 3 days n Direct to video film

Toy Story 2 n Software tools –Alias|Wavefront –Amazon Paint –RenderMan

Newman! n Subdivision-surfaces n Polygonal hair (head) –Texture mapped on arms n Sculpted clothes n Complex shaders

Devil’s in the Details n Render in color n Convert to NTSC B/W n Add film effects –Jitter –Negative scratches –Hair –Static

Images

Images

Images

Stuart Little n 500 shots with digital character n 6 main challenges –Lip sync –Match-move (CG to live-action) –Fur –Clothes –Animation tools –Rendering, lighting, compositing

Stuart Little n 100+ people worked on CG –32 color/lighting/composite artists –12 technical assistants –30 animators –40 artists –12 R&D

Shooting Film For CG n Actors practice with maquettes n Maquettes replaced with laser dots –lasers on when camera shutter is closed n After each take, three extra shots –chrome ball for environment map for Stuart’s eyes –white and gray balls for lighting info

Match-moving n Film scanned n Camera tracking data retrieved n 3D Equalizer + Alias Maya to prepare (register) the digital camera n Once shot is prepared, 2D images rendered and composited with live action

Making Movies n Production Team n Production Line n Special Effects

Production Team n Directors n Modelers n Lighting n Character Animators n Technical Directors n Render Wranglers n Tools Developers n Shader Writers n Effects Animators n Looks Team n Security Officer n Janitor n Lackey