Real-Time Graphics for Feature Film Production...Shader Baking Sample RenderMan shaders used for...

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Real-Time Graphics for Feature Film Production

Transcript of Real-Time Graphics for Feature Film Production...Shader Baking Sample RenderMan shaders used for...

Page 1: Real-Time Graphics for Feature Film Production...Shader Baking Sample RenderMan shaders used for final image into OpenGL textures Us Bxdf inputs, combined when necessary due to real

Real-Time Graphics for Feature Film Production

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GPU Team

George Elkoura

David Yu Matthew Williams Pol Jeremias-Vila Takahito Tejima

Dirk Van Gelder

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Overview● Challenges● Pixar Tech for Real-Time Workflows● Effects● Future Work

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( clip )

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● Production assets● Optimized for beauty, not real-time rendering● Average hardware configuration:

○ GPU: 12 GB NVIDIA Quadro M6000○ CPU: 16-core Intel Haswell @ 2.3GHz○ RAM: 64 GB

Challenges

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6,000 Meshes

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81,000 Instances

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52 Million Faces

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100+ Billion Triangles

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This is a small shot

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Heavy Assets● Fx: millions of instances● Chars: hundreds of meshes● Crowds: tens of thousands of chars● Large sets: billions of polys in frustum● Subdivision: geometric growth in complexity

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Presto Animation System● Primary tool for :

○ Previs○ Layout○ Simulation○ Rigging○ Animation○ Crowd Animation

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( demo )

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● Deployed on Finding Dory● Scene described in terms of layers and references● Designed for multi-user workflows● DCC Interchange● Supported by Apple’s SceneKit● Open source release on Github July 26, 2016

Universal Scene Description

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#usda 1.0

def Cube “HelloCube” { double size = 1.0}

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#usda 1.0

def Cube “HelloCube” { double size = 1.0}

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#usda 1.0

def Cube "Cube" { double size = 1.0}

def "World" { over "CubeInstance1" ( references = </Cube> instanceable = true) { } over "CubeInstance2" ( references = </Cube> instanceable = true) { }}

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#usda 1.0

def Cube "Cube" { double size = 1.0}

def "World" { over "CubeInstance1" ( references = </Cube> instanceable = true) { } over "CubeInstance2" ( references = </Cube> instanceable = true) { }}

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● Layers● Inheritance● Variants● References● Payloads

USD Composition Arcs

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● L ayers● I nheritance● V ariants● R eferences● P ayloads

USD Composition Arcs

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( demo )

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graphics.pixar.com

http://graphics.pixar.com/usd
http://graphics.pixar.com/usd
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Subdivision Surfaces

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What is a subdivision surface?

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What is a subdivision surface?

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What is a subdivision surface?

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What is a subdivision surface?

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What is a subdivision surface?

48 384 1,572,864Poly Count:

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What is a subdivision surface?

Creased edges with varying sharpness and more!

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www.pixar.com/about/Pixar-In-A-Box

http://www.pixar.com/about/Pixar-In-A-Box
http://www.pixar.com/about/Pixar-In-A-Box
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OpenSubdiv● RenderMan’s subdivision algorithm● Fast evaluation for rigging● Fast rendering for preview● Broad API for many clients

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OpenSubdiv● Suitable for off-line rendering● Suitable for real-time applications● Major improvements in version 3.0

○ Simpler GPU shader configuration○ Faster CPU refinement○ Evaluation API○ Simpler API

● Coming this Summer version 3.1○ Smooth UV evaluation on patches○ Separate refinement levels○ 2nd derivative evaluation

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OpenSubdiv Evaluators● Osd: parallel evaluation

○ OpenGL Compute○ OpenGL Transform Feedback○ CUDA○ TBB○ OpenCL

○ ISPC

● Far: single-threaded evaluation○ Ideal for off-line rendering

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Feature Adaptive Subdivision

48 1,572,864Uniform:

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Feature Adaptive Subdivision

48 1,100Adaptive:

48 1,572,864Uniform:

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OpenSubdiv Contributors

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Integrated Tools & Render Engines

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Available on Github

github.com/PixarAnimationStudios/OpenSubdiv

https://github.com/PixarAnimationStudios/OpenSubdiv/
https://github.com/PixarAnimationStudios/OpenSubdiv/
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H Y D R AReal-Time Render Engine

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Hydra: Real-Time Render Engine● Render engine for content creation● Built for modern graphics APIs

○ Fastest w/ OpenGL 4.5 + Bindless Textures+ Bindless Buffers + Direct State Access

○ Graceful fallback to OpenGL 4.0

● Designed for scalability

See the GTC 2015 talk for technical details

http://on-demand.gputechconf.com/gtc/2015/video/S5327.html
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Hydra Engine Features● Highlighting for faces, points, etc● Just-in-time data consumption● Consumes RenderMan inputs● Hardware tessellated curves● Configurable representations● Render-based object picking● Heavily multi-threaded● Wireframe on surface● OpenSubdiv tessellation

See the GTC 2015 talk for technical details

Constant Uniform Varying

Face-varying Face-varying Texture

RenderMan Primvar Interpolation Modes

http://on-demand.gputechconf.com/gtc/2015/video/S5327.html
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Hydra Engine Features● Highlighting for faces, points, etc● Just-in-time data consumption● Consumes RenderMan inputs● Hardware tessellated curves● Configurable representations● Render-based object picking● Heavily multi-threaded● Wireframe on surface● OpenSubdiv 3.0

See the GTC 2015 talk for technical details

▶ Designed for feature film production

http://on-demand.gputechconf.com/gtc/2015/video/S5327.html
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#usda 1.0

def Cube "Cube" { double size = 1.0}

def "World" { over "CubeInstance1" ( references = </Cube> instanceable = true) { } over "CubeInstance2" ( references = </Cube> instanceable = true) { }}

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Hardware Instancing

Instancer

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]Prototype-1

Prototype-2[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

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Hardware Instancing

Instancer

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

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Hardware Instancing

Instancer

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

Offset

[ Instance Index ]

[ Instance Index ]

[ Instance Index ]

[ Instance Index ]

[ Translate Rotate Scale ]

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Hardware Instancing

Instancer

[ Translate Rotate Scale ] Prototype-1

Prototype-2[ Translate Rotate Scale ]

[ Translate Rotate Scale ]

Offset

[ Instance Index ]

[ Instance Index ]

[ Instance Index ]

[ Instance Index ]

[ Translate Rotate Scale ]

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But what about instancers

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But what about instancersthat instance

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But what about instancersthat instance

more instancers?

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But what about instancersthat instance

more instancers?!

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Recursive Instancing

Instance all the things

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( demo )

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Hydra Integration● Push-Pull Data Model

○ Push: Scenegraph declare primitives○ Pull: Hydra requests data from primitives on demand○ Avoids pulling all data up front

ApplicationScenegraph

Data

HydraGPU Buffer

Data

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Hydra Integration

Scenegraph Adapter HydraRenderIndex

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Hydra Integration

Scenegraph Adapter

HydraRenderIndex

Scenegraph Adapter

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Hydra Integration

PrestoScenegraph

PrestoAdapter

HydraRenderIndex

USDScenegraph

USDAdapter

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Integrated with ...

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Presto

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usdview

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Maya

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Katana

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Hydra for Virtual Production

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Millennium Falcon● 14,500 meshes● 140 textures @ 8k each● Hybrid renderer:

○ Native ILM scenegraph○ Hydra populates g-buffer○ ILM’s engine does deferred shading & lighting

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graphics.pixar.com

Hydra open sourced with USD!

http://graphics.pixar.com/usd
http://graphics.pixar.com/usd
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Effects

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● Easy to setup and maintain● Reliable approximation of the final render

○ Don’t mislead the artist

● Keep the common case fast● Minimal asset build requirements

Requirements

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Building Effects: The Render Graph

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Real-Time Effects in Presto● Depth of Field● Soft Shadows● Ambient Occlusion● Portal Reflections● Reflection & Refraction● Motion Blur● Barrel Distortion

● Scene & Camera Lights● Murk Light● Post-Effect Lights● Camera Masking● Curvature● Fur / Hair / Feathers● Refractive Eyes

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( demo )

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Physically-Based Shading● RenderMan

● Real-time OGL approximation

More info : blog.selfshadow.com/publications/[s2012,s2013,s2014,s2015]-shading-course

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Physically-Based Shading● RenderMan

● Real-time OGL approximation

More info : blog.selfshadow.com/publications/[s2012,s2013,s2014,s2015]-shading-course

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Physically-Based Shading● RenderMan

● Real-time OGL approximation

More info : blog.selfshadow.com/publications/[s2012,s2013,s2014,s2015]-shading-course

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Physically-Based Shading● Complex material networks

○ Baked signals from RenderMan

diffuse color specular color specular roughness displacement

clearcoat color clearcoat roughness roughspecular color roughspecular roughness

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Physically-Based Shading● Complex material networks

○ Baked signals from RenderMan

diffuse color specular color specular roughness displacement

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Physically-Based Shading● Complex material networks

○ Baked signals from RenderMan

diffuse color specular color specular roughness displacement

4K 4K 4K 4K

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● We need compression, lots of compression!○ Hello BPTC!

○ BC7 & BC6H

Lots of Textures

16 bytes

16 pixels * 3 channels * 1 byte = 48 bytes

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Uncompressed Compressed

Lots of Textures

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UV and Ptex● Support for both!● UV

○ Characters

● Ptex○ Sets○ Backlot

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Shader Baking● Sample RenderMan shaders used for final image into OpenGL textures● Us Bxdf inputs, combined when necessary due to real time constraints● Use Katana livegroups wired through command line python scripts ● Built-in support new in RenderMan 21

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( demo )

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Future Work● Ground truth effects (accumulation buffer, motion blur, etc)● Volumetric effects● Subsurface Scattering● Hydra & OpenSubdiv support for Vulkan/DX12/Metal

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Thank You!USD Team

Pixar R&D Department

All Pixar Artists and TDs

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Contributors

○ Hydra and USD : Jeremy Cowles○ OpenSubdiv : Barry Fowler

Special Thanks

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We’re Hiring!

www.pixar.com/careers


Diffraction Shaders Shaders - University of Toronto · Diffraction Shaders Jos Stam Alias | wavefront Seattle, WA USA From microsurface models to reflection models Shaders Model reflection

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RenderMan, Theory and Practice

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RenderMan & Its Shading Language

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0532abajaj/cvc/software/docsTRLIB/CB3TM.pdf · The three textures Bmarble, Wood, and Eroded were created using the RenderMan surface shaders blue-marble( ) , wood( ) , and eroded(

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Formation Renderman - medias.3dvf.commedias.3dvf.com/publish/renderman/Extrait-formation-RenderMan-Progiss.pdf · - Volumetrics 3éme Jour - Slim - PTEX Reading & Baking - Raytracing

Formation Renderman - medias.3dvf.commedias.3dvf.com/publish/renderman/Extrait-formation-RenderMan-Progiss.pdf · - Volumetrics 3éme Jour - Slim - PTEX Reading & Baking - Raytracing

Renderman Rendering - plaete.com · Mental Ray, Vray • No rays are shot from the camera ... – Renderman For Maya – Renderman Studio – 3Delight maya – Animal Logic MAYAMAN

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Creating custom real-time shaders using ShaderFX for Maya

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Canonical Shaders for Optimal Performance Canonical Shaders for

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Week 3 - Friday. What did we talk about last time? Vertex shaders Geometry shaders Pixel shaders.

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RenderMan Introduction

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Graphics shaders

Graphics shaders

Tesselation Shaders

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Cubes usando shaders algoritmo Marching Implementação dodmc/pgpgpu/12.pdf · Implementação do algoritmo Marching Cubes usando shaders Luiz Fernando Oliveira Corte Real lreal@ime.usp.br

Cubes usando shaders algoritmo Marching Implementação dodmc/pgpgpu/12.pdf · Implementação do algoritmo Marching Cubes usando shaders Luiz Fernando Oliveira Corte Real [email protected]

Renderman Shaders - Bournemouth University · Renderman Shaders •Renderman provides a number of different shader types all of which can be written in the Shading Language (SL) •These

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Shaders Textures

Shaders Textures

RenderMan for Everyone: SIGGRAPH 2006 course notes

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Rendering crowds with Pixar’s RenderMan

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OpenGl Shaders

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Geometry Shaders

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Renderman - Tutorials

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