Unity Platform

API for baking Light Probes

Apr 2, 2025
Released
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Summary

With Unity 6 we introduce a new API for baking Light Probes. Baking no longer relies on the Lightmapping delegates, where the user gets callbacks during the baking process. Instead, the process is very explicit and free of side effects, enabling the user to control how many probes to bake at a time to balance execution time vs memory usage.

User Outcome

We expose a GPU backend focused on high performance and using OpenCL internally. A future backend will be able to use hardware accelerated ray tracing.

We use the APV probe baking editor code as the example for how to use the API.

Documentation is available now: RadeonRaysContext, RadeonRaysProbeIntegrator and RadeonRaysProbePostProcessor.

Note that this API is only available for Light Probes and uses scene based input extraction. Lightmap support and support for procedural geometry is planned for a future release.

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