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Fixed in 2021.2.X



Found in


Issue ID




OpenCL max alloc size exceeded when baking probe volumes

Progressive Lightmapper


Use a modified HDRP template scene which contains a light cookie, probe volume and a legacy light probe group, for instance the project from case 1321887 as a starting point:
*Fetch the HDRP graphics repo at sha 196f36cf8498b9099363808ddcf3138d2dab379f
*Download the repro project at
*Update the manifest.json in HDRPTemplatePV/Packages to point to your local HDRP repo
*Set EnableProbeVolumes = 1, in Runtime/ShaderConfig.cs
*Bake lighting

Expected result: bake completes or an actionable error message is shown before CPU fallback.

Actual result: endless error spam of OpenCL unknown errors and fallback to CPU lightmapper.

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