Open Source Days 2025

Order Independent Transparency remains one of the most technically persistent and visually critical challenges in real-time rendering pipelines, especially in game engines and digital content creation. Traditional alpha blending techniques require precise sorting of geometry by depth, which breaks down in dynamic scenes with intersecting geometry, high object counts, or layered effects. This talk will unpack why OIT is a practical necessity for accurate visual storytelling in VFX and animation pipelines.

The session will

Start with the history of the problem and its impact on current real-time production environments.

Discuss advanced OIT techniques, including Stochastic Transparency, Moment-Based OIT, and Deep Learning-Assisted OIT, with insights into performance, visual fidelity, and integration considerations.

Highlight open-source implementations and potential solutions that are easy to integrate in existing engines or extend OIT in open production pipelines.