rtx: environment-map MIS (balance heuristic)#311
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jeffamstutz merged 1 commit intoJun 12, 2026
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Add balance-heuristic multiple importance sampling for the environment light across the Quality and Interactive path tracers and MDL: - NextRay.pdf carries the BSDF sampling pdf for the next bounce - pbrBsdfPdf + view-only PBR lobe selection - materialEvalPdf EvaluatePdf callable - MDL env MIS via mdlBsdf_evaluate / sample_data.pdf Also fix HDRI radiance being double-counted on bounced-ray misses in the Quality path tracer.
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Add balance-heuristic multiple importance sampling for the environment light across the Quality and Interactive path tracers and MDL:
Also fix HDRI radiance being double-counted on bounced-ray misses in the Quality path tracer.
Gets better first frames for low sample counts: