Universal Scene Description* (USD) is an open source initiative developed by Pixar for fast, large scale, and universal asset management across multiple programs including Maya, Houdini, and others.

1. Open Source Interactive CPU
Rendering with Pixar Animation
Studio’s Universal Scene Description*
Carson Brownlee - Intel
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS

2. LEGALDISCLAIMERSANDOPTIMIZATIONNOTICES
2
No license (express or implied, by estoppel or otherwise) to any intellectual property rights is granted by this document.
Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of
performance, course of dealing, or usage in trade.
This document contains information on products, services and/or processes in development. All information provided here is subject to change without notice. Contact your Intel representative to obtain the latest forecast,
schedule, specifications and roadmaps.
The products and services described may contain defects or errors known as errata which may cause deviations from published specifications. Current characterized errata are available on request.
Intel technologies' features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No computer system can
be absolutely secure. Check with your system manufacturer or retailer or learn more at intel.com.
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer
systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your
contemplated purchases, including the performance of that product when combined with other products. For more information go to www.intel.com/benchmarks
Benchmark results were obtained prior to implementation of recent software patches and firmware updates intended to address exploits referred to as "Spectre" and "Meltdown". Implementation of these updates may
make these results inapplicable to your device or system.
Intel, Xeon and the Intel logo are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries.
*Other names and brands may be claimed as the property of others
© Intel Corporation.

3. PIPELINE
3
Application
USD*
Hydra
OpenGL Embree OSPRay
Embree
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

4. PIPELINE
4
Application
USD*
Hydra
OpenGL Embree OSPRay
Embree
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

5. USD*PIXAR Animation Studios
Universal Scene Description
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS

6. USD*
“scalable interchange of geometric and shading data between DCC's in a 3D content creation pipeline”
Lightweight scene graph describing “assets” - files with geometry/shading information
Over 25 years of progressive development by Pixar
Open Source (2016 - modified Apache* license)
6
MARIONETTE PRESTO*+TIDSCENE
- - - USD*
1995 1998 2012 2012+
TOYSTORY ABUG’SLIFE BRAVE
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

7. USD*
Standardized data model for defining and editing assets
Multi-user and multi-application development
Support for Maya*, Katana*, Houdini*, and other applications
UsdShade specifies standardized shading across applications for consistency
7
MAYA
+
PRESTO*
(ORHOUDINI,KATANA,
ETC)
*IMAGESCOURTESYDISNEYPIXAR *OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

8. USD*Designed for fast loading and editing of large-scale assets
Fast previewing of the assets is vital
Currently has released backends for OpenGL and Embree (AO) through Hydra
We introduce an interactive, open-source, CPU-based path tracer backend with OSPRay
8
OPENGL OSPRAY
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

11. HYDRAPIXAR Animation Studios
Portable Rendering Framework

12. PIPELINE
12
Application
USD*
Hydra
OpenGL Embree OSPRay
Embree
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

13. HYDRA
Common rendering interface with multiple backends
Provides consistent results across front-end applications using USD* scene graphs
Support for subdivision surfaces (OpenSubdiv an option)
Fast preview and animation of USD scenes
A common point of entry for implementing a renderer backend across multiple applications
13*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

14. IRF/SDVISINTEL® Rendering Framework

15. 15
INTEL®OpenSWR
INTEL®Embree
INTEL®OSPRay
INTEL®RENDERINGFRAMEWORK
INTEL®OpenImageDenoise
+

16. 16
INTEL®OpenSWR
High Performance Software Rasterization
Optimized for multi-thread and wide vector lanes
Drop in replacement for OpenGL
Integrated into Mesa
Driver option for Mesa distributions (v12+)
Not built in source by default
CPU Rendering
Full system memory
Render directly on compute nodes
Scientific Visualization Focus
Supports major SciVis apps,
ParaView*, VisIt*, EnSight*, etc
openswr.org
*SWRIMAGEBYSILVIORIZZANDJOEINSLEY,ARGONNENATIONALLAB *OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.
INTEL®RENDERINGFRAMEWORK

17. 17
INTEL®Embree
INTEL®RENDERINGFRAMEWORK
INTEL®OSPRayINTEL®OpenSWR
INTEL®OpenImageDenoise
+

18. 18
INTEL®Embree
Industry Leading CPU Performance
1.5-6x speedups reported by users
Optimized Ray Tracing Kernels
Acceleration Structures
Ray Traversals
Ray Intersections
Open Source
Apache* 2.0 License
http://embree.github.com
Many Use Cases
Real-time applications
Photorealism
Simulation
Embree: A Kernel Framework for Efficient CPU Ray Tracing
Wald et al. (SIGGRAPH ’14)
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.
INTEL®RENDERINGFRAMEWORK

19. Title Text
19
INTEL®EMBREE
*MODELBYJOHNCEDRICGOMEZMACABANTAD.RENDEREDBYKHALIDABUEIDWITHSIMLAB

20. Title Text
20*MIKKOHöRKKö,RENDEREDWITHSIMLAB

21. Title Text
21*MARTINGEUPEL,CORONARENDERER

22. 22
CPU/Embree OnlyCorona Renderer
Vray Embree Hair PrimitivesDWA HowTo Train YourDragon 2
ADSK 360 Cloud –>50M Renders
ParaView with OSPRAy
ANL VL3 Dark Matter - OpenSWR
SURVICE StingRay
Rendered with FluidRay RT
Cinema4D
WIDEADOPTION-60+APPS
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

23. PERFORMANCE:INTEL®EMBREEVS.NVIDIAOPTIX*
23
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark* and MobileMark*, are measured using specific computer
systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your
contemplated purchases, including the performance of that product when combined with other products. For more information go to http://www.intel.com/performance.
0
10
20
30
40
50
60
70
80
90
Bentley
(2.3M Tris)
Crown
(4.8M Tris)
Dragon
(7.4M Tris)
Karst Fluid Flow
(8.4M Tris)
Power Plant
(12.8M Tris)
Intel® Xeon® Platinum 8180
2 x 28 cores, 2.5 GHz
Embree 2.17.4
NVIDIA Tesla P100
PCIe, 16 GB RAM
OptiX 5.1.0
NVIDIA Tesla V100
PCIe, 16 GB RAM
OptiX 5.1.0
Software and workloads used in performance tests may havebeen optimized for performanceonly on Intel microprocessors.Performancetests,such as SYSmark* and MobileMark*,are measured using specific
computer systems, components,software,operations and functions.Any changeto any of thosefactors may cause theresults to vary. Youshould consult otherinformation and performancetests to assist you
in fully evaluating your contemplated purchases,includingthe performanceof that product when combined with otherproducts.For more information go to http://www.intel.com/performance.
Frames Per Second (Higher is Better), 1024x1024 image resolution
Embree 2.17.4, Intel® C++ Compiler 18.0.3,
Intel® SPMD Program Compiler (Intel® SPC)
1.9.2
NVIDIA OptiX* 5.1.0, CUDA* 9.2.88
Source: Intel
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

24. PIPELINE
24
Application
USD*
Hydra
OpenGL Embree OSPRay
Embree
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

25. HYDRA+INTEL®EMBREE
CPU-based rendering
Deployed with USD repo as a sample Hydra backend
Developed by Pixar
Ray casting with hardcoded AO for now
No shading
25

26. 26
INTEL®OSPRay
INTEL®RENDERINGFRAMEWORK
INTEL®Embree
INTEL®OpenSWR
INTEL®OpenImageDenoise
+

27. 27
INTEL®OSPRay
Open Scalable Portable Ray Tracing Engine
Utilizes Embree
Optimized for laptops, workstations,
and multi-node clusters
Open Source under Apache* 2.0
Distributed Rendering
Multiple nodes for greater speed
Larger cumulative memory
In Situ applications
Portable
Plugin Interface
Modular
User Defined Geometry
Scientific Visualization
Distributed with ParaView binaries
Support for VMD, EnSight*, VisIt*, many others
Multiple Use Cases
Real-time rendering
Photorealism
Simulations
OSPRay - A CPU Ray Tracing Framework
for Scientific Visualization
Wald et al. (TVCG, IEEE SciVis ’16)
ospray.org
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.
INTEL®RENDERINGFRAMEWORK

28. 28
VL
Brayns
PowerCT
NASA
VL3Brayns
Polio Virus
Courtesy John Stone,Beckman
Institute, Univ. Illinois at Urbana-
Champaign
esy Kitware.
on, Carson Brownlee,
Data: Salman Habib, Katrin Heitmann,
and the HACC team.
Visualization: Joe Insley, Slivio Rizzi,
ANL
Data and Visualizationcourtesy
Cyrille Favreau, EPFLCourtesy Sean Ahern, CEI and
General Motors
Courtesy Hank Childs,U Oregon,
Jian Huang and AlokHota, UTenn
Data courtesy Kitware.
Visualization, Carson Brownlee,
Intel
Courtesy Sean Ahern
General Motor
Courtesy Hank Childs,U Oregon,
Jian Huang and AlokHota, UTenn
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.
BROADINDUSTRY+ACADEMICSUPPORT

29. *DATACOURTESYDKRZ

30. Title Text
30*DATACOURTESYEASTERNGRAPHICS,TACCRATTLERDISPLAYWALL

31. ADDIMAGEOFMOANAISLAND
SCENE-RENDERHUGE
DATASETS
MOANAISLANDSCENE:15FPS+,~160BILLIONPRIMS

32. PRIMITIVES
Triangle Mesh
Quad Mesh
Streamlines
Spheres
Cylinders
Instances
User Defined Geometry
Subdivision Surfaces (to be released)
Grid (to be released)
Volumes
Isosurfaces
Slices

33. MATERIALS
Physically-based materials
Alloy, CarPaint, Glass, Metal, MetallicPaint, Plastic, ThinGlass, etc.
Artistic materials
“Principled” BSDF Shader - similar to Disney’s Principled BSDF

34. EXTENDINGWITHINTEL®ISPC
c99-based SPMD language
Written similar to scalar code
Vector support for multiple ISA targets (Intel® SSE, Intel® AVX, Intel® AVX2, Intel® AVX-512)
Used to optimally add different:
renderers
shaders
custom geometry
pixel operations
etc.
34

35. WHATOSPRAYISNOT
35
Renderman*, Arnold, VRay, etc.
WHATOSPRAYIS
A highly optimized, turn-key renderer with limited features
+
An extensible, Open-source starting point to writing renderers
+
An API
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

36. 36
INTEL®OpenSWR
INTEL®Embree
INTEL®OSPRay
INTEL®RENDERINGFRAMEWORK
INTEL®OpenImageDenoise
+

37. INTEL®OpenImageDenoise
+
No Denoising Denoised
INTEL®RENDERINGFRAMEWORK

38. HYDRA+INTEL®OSPRAY
38
Interactive to real-time CPU-based rendering
Utilizes large system RAM - Render 100GB+ of data on a single workstation
Raycasting, Shadows, AO, Path Tracing
Principled BSDF shader - similar to Disney’s Principled shader
Distributed rendering with MPI
Display Walls
Subdivision Surfaces
Interactive Denoising
Support for usdShade in progress

39. PIPELINE
39
Application
USD*
Hydra
OpenGL Embree OSPRay
Embree
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS.

40. USD*+HYDRA+INTEL®OSPRAY
OPENGL BASIC AO PATHTRACED
125FPS 37FPS 36FPS 27FPS
WITHPROGRESSIVEREFINEMENT, DEFAULTVIEW@4K,ZOOMEDINPORTIONOFIMAGESHOWN. 2XINTEL*XEON*E5-2699V3@2.3GHZ,GEFORCE*GTXTITANX
*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS
GPU ———————-CPU———————

41. DEMO

42. 42

43. BUILDING
https://github.com/carsonbrownlee/USD
Built as a hd Plugin, currently needs to be placed in pxr/imaging/plugins/hdOSPRay
Enabled in CMAKE as a buildable option - PXR_BUILD_OSPRAY_PLUGIN
Set ospray_Dir to OSPRay install directory
PREREQUISITES
OSPRay 2.7.0+
Embree 3.2.1+ (included in OSPRay binary release)
43

44. RUNNING
ENVVARS
HDOSPRAY_SAMPLES_PER_FRAME
HDOSPRAY_SAMPLES_TO_CONVERGENCE
HDOSPRAY_AMBIENT_OCCLUSION_SAMPLES
HDOSPRAY_CAMERA_LIGHT_INTENSITY
HDOSPRAY_USEPATHTRACING
LAUNCHUSDVIEW
select View -> Hydra Renderer -> OSPRay
44

45. CODE
Uses hydra (hd) layer to access geometry and parameters
Hydra code is isolated from USD* and can be used outside of USD
All code changes in pxr/imaging/plugins/hdOSPRay
Currently triangle mesh only - no subdivision surfaces
By default colors are mapped from hdTokens as a single color per object
Experimental usdShade support
OSPRay calls not thread safe - I used a mutex for this
45*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS

46. CODE
OSPRay provides a turn-key rendering solution
Most of Hydra implementation straight forward
This is all the code required to create the OSPRay
mesh with mappings from Hydra representations
create mesh
specify vertex data
color array

47. FILESOFNOTE
config.cpp
Sets up OSPRay state, accessible as a singleton in HdOSPRayConfig::GetInstance()
mesh.cpp
Create/update OSPRay instances, meshses, and materials when relevant scenegraph changes
instancer.cpp
Track instance transforms
renderDelegate.cpp
Create and manage OSPRay context, including allocated resources and supported prim types
renderPass.cpp
In charge of the OSPRay render call, camera, framebuffer, and lights
47

48. COMMUNITYINTERACTION
We want our collaborators and users involved!
Modules and SDK make OSPRay relatively straightforward to extend
We have limited ability to implement everyone’s feature requests
We are not experts in everyone’s domain…we do rendering!
We welcome contributions back into OSPRay
We can get more done together
If you use OSPRay (or have even just tried it), let us know!
It helps us understand what our users are interested in and how to best serve those interests
48

49. SUMMARY
Open source CPU ray tracing in Pixar’s Hydra open source renderer
Path tracing and physically based + intuitive shading
Interactive and real-time render rates
Denoiser
Distributed rendering in any application that uses USD+Hydra
Industry supported with an active community
49

50. THANKSTO
Pixar USD Team
George ElKoura
Matthew Williams
Pol Jeremias-Vila
50*OTHERNAMESANDBRANDSMAYBECLAIMEDASTHEPROPERTYOFOTHERS

51. 51
http://www.ospray.org/ https://software.intel.com/sdvis
THANKYOU
COMESEEOURDEMOSATBOOTH#1300!
Interactive Path Traced USD
Interactive ~100GB Disney Moana Island Scene
+

52. Intel technologies’ features and benefits depend on system configuration and may require enabled
hardware, software or service activation. Performance varies depending on system configuration.
No computer system can be absolutely secure. Software and workloads used in performance tests
may have been optimized for performance only on Intel microprocessors.
Performance tests, are measured using specific computer systems, components, software,
operations and functions. Any change to any of those factors may cause the results to vary. You
should consult other information and performance tests to assist you in fully evaluating your
contemplated purchases, including the performance of that product when combined with other
products.
Copyright © 2016 Intel Corporation. All rights reserved. Intel, Intel Inside, the Intel logo, Intel
Xeon and Intel Xeon Phi are trademarks of Intel Corporation in the United States and other
countries. *Other names and brands may be claimed as the property of others.
Copyright © 2016 Intel Corporation, All Rights Reserved
Legal Notices and Disclaimers