Illumination with large data sets Updating the Lanscape of Human - - PowerPoint PPT Presentation

Real Time Global Illumination with large data sets

Updating the Lanscape of Human Engineering and Perceived Quality

Dennis Malone

Human Engineering Nissan Technical Center - North America

Opening Intro

• Nissan began a global initiative to become digitally orientated during the

development process

• Design reviews of vehicle craftsmanship and perceived quality were only

partially focused in the digital realm in surfacing programs

• In 2005-06 before digital prototype and mockup, all development stages

were handled in physical commodities

• Design reviews were a multi-site collaborative event
• A more efficient and cost effective method was needed that allowed for

fast, accurate evaluations from concept to production

• 2007 new process and hardware developed internally
• Photorealistic models was the decided direction
• Software and hardware options were investigated

First Photorealistic Model

• Process needed to be improved
• Improved workflow and focused on reducing cost
• Higher detection rates
• High content models
• Complete system overview
• Shortfalls
• Baked shadows
• Long model creation time
• Closures and animations

Model Complexity Grows

• Separate models
• Engine and chassis separate
• Harness information separate
• Sharing models with other users not possible
• Hardware was complex and costly
• Custom textures
• Lower frame rates with certain textures
• Materials internal to Nissan could not be used

Complete Data Sets

• More powerful workstations
• Continuous upgrades to all hardware aspects
• Graphics
• RAM
• Workstation
• Low density poly mesh was used .1
• Reduced poly count
• Lacked fidelity
• Tight fillets and small parts not possible to judge

.1 .01

Complete Data Sets

• Entire vehicle based on BOM structure
• All class A surface data at .01 density
• Multiple grade variants
• Soft modeled components
• No data cleaning/removal for ray trace

Lighting - Shadows

• Initial lighting was homogeneous
• Shadowing was baked
• Long calculating time
• Some errors
• During animation, baked shadows would remain.
• Highlights unrealistic
• Reflections unrealistic

Lighting – Interactive Shadows

Lighting - Environments

• Improvements
• Higher resolution surroundings
• Custom HDR environments
• Interactive ambient occlusion shadowing
• Improved shadowing
• No issues with animations
• NTC-NA Farmington Hills
• NTC-E Cranfield

Lighting- Ray tracing

• Improvements from hardware advancements
• Full models
• Lighting options
• Bounces can be increased for real world results

Lighting- Ray tracing

• Veiling glare studies
• Material selection

Global illumination performance

• 67 million polygon count!
• Never before seen performance

Lighting- Global Illumination

• FR end internal component visibility

Lighting- Global Illumination

• Wheel house visibility

Lighting- Global Illumination

• Fr fender to door gap

Lighting- Global Illumination

• Under hood appearance

Lighting- Global Illumination

Lighting- Global Illumination

Lighting- Global Illumination

Lighting- Global Illumination

Ever evolving technology- Graphics Cards

• Workstations are not replaced often
• OS and platforms are developed internally
• Upgrade capable for GPU and RAM
• Began with FX 5800 - 4GB
• Quadroplex to increase GPU performance
• Quadro 6000 – 6GB
• Maxwell 5000 - 8GB
• Quadro K6000 – 12GB
• Quadro M6000 – 24GB
• PCIe expander 24GB x 5!!

Thank You – Questions?