THREE.JS / MATERIALS / FASTHDR CONTRACT

One room, five responses.

The pinned FastHDR source uses KTX2Loader to load a PMREM environment, assigns CubeUVReflectionMapping to the scene, and compares transmission, rough dielectric, polished metal, brushed metal, and green dielectric spheres under ACES filmic tone mapping.

StartingWEBGL2 / FASTHDR
Preparing KTX2Loader and the local PMREM fixture.
source image
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material set
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environment mapping
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sample avg / p95
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The official eight KTX2 assets, exact image decode, original page/pixel composition, browser/device/performance breadth, and whole-example fidelity remain separate boundaries. Image selection is intentionally labeled while this route stays deterministic and local.

Sources: official FastHDR example · pinned source · KTX2Loader docs