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View, browse and sort the ever-growing list of sessions by day, pass type, topic, and format. With this Session Viewer, you can view GDC 2023 session details and speakers, and share your favorites via social media. You will be able to build your schedule and access it during the show via export or Mobile App, once live. Sessions do fill up and seating is first come, first serve, so arrive early to sessions that you would like to attend.

Advanced Graphics Summit: Realistic Real-Time Sky Dome Rendering in 'Gran Turismo 7'

Kentaro Suzuki  (Lead Graphics Programmer, Polyphony Digital Inc.)

Kenichiro Yasutomi  (Technical Artist, Polyphony Digital Inc.)

Location: Room 301, South Hall

Date: Monday, March 20

Time: 10:50 am - 11:50 am

Pass Type: All Access Pass, Summits Pass

Topic: Programming

Format: Lecture

Vault Recording: Video

Audience Level: Intermediate

Gran Turismo 7 includes the feature of dynamic time and weather changes to create a more realistic driving experience and the excitement of dramatic racing action. To achieve this, the team at Polyphony Digital implemented a new sky dome rendering system.

Sky dome has two main parts: the sky and clouds. The team studied a highly accurate atmospheric model for sky rendering and developed a highly efficient run-time look-up table. Furthermore, they implemented noise-based modeling and lighting with ray marching for cloud rendering.

Through this session, attendees will gain insight into a method for rendering the sky dome based on a higher quality atmospheric model—compared to conventional methods and its use for real-time rendering. In particular, a fundamental technique of atmospheric scattering simulations, the importance of measurement-based atmospheric composition, and accurate Mie scattering will be discussed in detail.


The audience will gain insight into the real-time rendering of photorealistic skies based on physical atmospheric models, as well as problems and solutions when integrating them into real games.

Intended Audience

This is for mid-to-experienced graphics programmers interested in rendering sky and atmosphere in real time.