Real-Time Cutscenes Hand Keyed Animations Joint Only Face Rigs
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3 Real-Time Cutscenes Hand Keyed Animations Joint Only Face Rigs
4 Impactful BackStory Realistic Characters and Animations Facial Motion Capture Bodies/Faces/Eyes/Audio -Simultaneous Multiple Actors Simultaneous Real-time Cutscenes
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6 Hand Keyframed 3d Scan Capture Per Frame Performance Muscle-Based/Simulation Data Driven/Example Based
7 Requires a Data Set of known example input to ouput Enough data to make a generalized representation Data-Set Facial Scans (F.A.C.S) (Paul Ekman) Consistent Facial Marker Set (scans/mocap) New Inputs Tracking (same marker set) Solver (Applies Mocap Data to Rig/Shapes) Motion Retarget to Game Characters
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10 Pre-Captured (One time setup cost) 70 Facial Pose Scans per actor Scan Re-mesh to consistent Topology Scan Hardware Used 2 linked structured light field Scanners Captured in Static Volume Stabilize/Align Scans
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14 Consistent Topology/Blendable Consistent Marker Correspondence Custom Vacuform Masks Track Markers/Warp Fit/ Subdivide/Snap Combine Faces with Entire Head Model Tweaks (Noisy/Missing Scan Data Eyes/Mouth)
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17 Head Mounted Camera Rigs (HMR) Simultaneous Capture Face/Body/Eyes/Audio Timecode Hardware Sync Multiple Actors Projection Mask Animation Marker Tracking
18 Methods (2d vs 3d) Optical Flow Feature Recognition Triangulation Software Noise Reduction Stabilization Moving helmets/day to Day/Shot to Shot align Missing Marker Data/ Occlusion Lighting Conditions
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20 Methods Game Character Face Rig, trained to use Drivers from actor for Blend Weights Transfer Blend Weight results (Shape Weight Correspondence between character poses if needed) Hint Based Scalars On Base Scaffold Proportion Constraint (method we used) Shape Re-target Marker Motion Re-target Easily Tie motion to joints
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24 Linear BlendShapes Easy to Animate Weights Over-Adding Issues-need to normalize Posey results
25 Pose Space Deformation (PSD) as solver A method of deriving shape weights from marker data Uses Radial Basis Function (RBF) Applied as Deformer node, shapes driven indirectly though a face rig- controls will get automatic shape interpolation Markers as Drivers / Motion Vectors Setting up Matrix/ Single Value Decomposition (SVD) Shapes Converted to PreSkinCluster Relative to Default
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27 Actor BlendShape Game Char SkinCluster & PSD Game Char BlendShape
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31 Fine Tuning PSD Attributes Input Width Regularization Balance Pose Space (Gaps/Shape Overlap) Drop poses too close Testing Drivers ROM test/ BlendShape test Expose Solver Attributes to Animators Using Multiple PSDs with normalized deformer weights Fewer Drivers for Independent Regions Like Weighted PSD
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33 Pose Training Phase (One Time) surface locators PSD Deformer applied Pre-SkinCluster Joints per Facial Marker Track Drives Skin and Vertex Level Deformations Efficient Streaming No Dense Shape Memory Smooth Natural Arcs in Motion
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37 2D versus 3d Tracking 2d requires only 1 camera per head rig 3d requires 4 cameras per head rig 3d track can use the 3d data to verify accuracy 3d track gives better visualization/sillhouette 3d track can be used to warp/fit results tighter 3d track provides extra dimensionality for lips
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41 Variety of Animation Controls (Gross and Fine Control) Gross Controls -Directly Manipulate Key Drivers Fine Controls -Directly Manipulate each joint UI Picture per actor pose with multiple Region Sliders Automatic Shape Interpolation with all controls
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44 Animator Attributes RBF, input widths, Shape Influence, Drop Shapes Per Joint control weight From Pure Pose Space to exact 3d track Additive versus Animation Over-takes Mocap automatically Sticky Lips Attributes Eye Drag Multiplier Attributes
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46 Compression and Stretch Independent across face Detects Local Volume changes relative to Default Low Res Cage associates connectivity of high res Faster Calculation Smoother Falloff Art Direct which Areas to be Driven Together (cage shape) Created the Normal Maps using depth difference between Raw dense FACS scans and final resolution
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52 Deformer Applied Pre-SkinCluster Better Compression with small range offsets Joint Animation as Animation L.O.D. GPU Decompression during streaming Normal Recalculation Required Seam Fixing (shared edges) Snag GPU round-off versus Maya skin Weights In Engine Wrinkle/Crease matches anim rig
53 Tracking Issues Stabilization, Camera Calibration Requires Fast Feedback loop applied to actor-only Rig, for iteration to verify track Retarget some room for improvement Infer Jaw Motion/Teeth aimed at center of two lower jaw markers-(not perfect so allow offset animation) Attention to deformations of neck where join PSDs
54 References Facial Action Coding System, [Paul Ekman, Wallace V. Friesen, Joseph C. Hagar, 2002, 1978, Consulting Psychologists Press, Palo Alto] Pose Space Deformations: a unified approach to shape interpolation [J.P. Lewis, Matt Cordner, Nickson Fong, Siggraph 2000] Realtime Facial Animation with On-the-fly Correctives [Hao Li, Jihun Yu, Yutin Ye, Chris Bregler, Siggraph 2013, ACM 2013] Animating Blendshape Faces by Cross-Mapping Motion Capture Data Zhigang Deng/USC, Pei-Ying Chiang/USC, Pamela Fox/USC, Ulrich Neumann /USC WPSD- Modeling Deformable Human Hands from Medical Images Tsuneya Kurihara1 and Natsuki Miyata2 A Brief Introduction to Statistical Shape Analysis Mikkel B. Stegmann and David Delgado Gomez /Informatics and Mathematical Modelling, Technical University of Denmark Richard Petersens Plads, Building 321, DK-2800 Kgs. Lyngby, Denmark Interactive Region-Based Linear 3D Face Models [J. Rafael Tena, Fernando De la Torre, Ian Mathews, Siggraph 2012] EM algorithms for pca and spca. Advances in Neural Information Processing Systems, MIT Press, ROWEIS, S Dense 3d motion capture for human faces. FURUKAWA, Y., AND PONCE, J In 2009 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR 2009), June 2009, Miami, Florida, USA, IEEE,
55 Co-Contributor Adrian Bentley Lead Engine and Render Team Additional Contributions Josh Jersild Senior Programmer Shuai Liu Senior Programmer Stephen White - Co-Lead Tools & Engine Team
56 THANK YOU!! And special Thanks to the GDC Committee! and GDC mentor Ru Weer Questions? twitter: spensa3d
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Creative Web Designer Course Photoshop 1. Getting to Know the Work Area Starting to work in Adobe Photoshop Using the tools Setting tool properties Undoing actions in Photoshop More about panels and panel