GDC is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.

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.

Populating the World With an Acoustic Graph in 'Cyberpunk 2077'

Marek Bielawski  (Audio Programmer, CD PROJEKT RED)

Location: Room 2010, West Hall

Date: Wednesday, March 22

Time: 11:30 am - 12:30 pm

Pass Type: All Access Pass, Core Pass, Audio Pass

Topic: Audio, Programming

Format: Lecture

Vault Recording: Video

Audience Level: Intermediate

In this talk, Marek Bielawski, Audio Programmer at CD PROJEKT RED, describes the programmer's journey to generate, stream, and utilize an acoustics graph in a big open-world game—from bad ideas to fair solutions, showing the challenges such as generation times, resource disk space, streaming time and runtime memory usage.

The talk describes the pipeline from voxelizing the entire world, picking the nodes, connecting them and preserving the edge connections, packing resources to serialize, representing the nodes and connections at runtime and also performing and interpreting the pathfinding to fine tune the believability of sound occlusion, and AI perception. It consists of some tricks to efficiently implement a large scale graph, and some dead ends the author stepped into along the way.


Attendees will gain insight and tips on how to approach a large open-world generation subject—learning the challenges in generating a 3D graph and some advised approaches to tackle them. Also, attendees will gain the knowledge of how occlusion works in their favorite Cyberpunk game.

Intended Audience

This is for programmers—especially those interested in audio—but also engine and generalists. Basic programming knowledge like cache policies, data containers, or basic algorithms should be enough to digest the talk.