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ToneMappingNode: properly handle alpha #29076

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merged 1 commit into from
Aug 8, 2024

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WestLangley
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For WebGLRenderer, the input to the tone mapping function is vec3 color.

However, for WebGPURenderer, the input is vec4 color. (And, since it is implemented as a post processing step, the RGB components have premultiplied alpha -- but that is not an issue here.)

The tone mapping operation and color space transform should be applied to the RGB channels only. The alpha channel should remain unchanged.

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github-actions bot commented Aug 7, 2024

📦 Bundle size

Full ESM build, minified and gzipped.

Filesize dev Filesize PR Diff
685.1 kB (169.6 kB) 685.1 kB (169.6 kB) +0 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

Filesize dev Filesize PR Diff
462 kB (111.5 kB) 462 kB (111.5 kB) +0 B
@WestLangley WestLangley marked this pull request as ready for review August 7, 2024 19:20
@WestLangley WestLangley changed the title WebGPURenderer: ToneMappingNode mishandles alpha Aug 7, 2024
@WestLangley WestLangley added this to the r168 milestone Aug 7, 2024
@sunag sunag merged commit 3e8a4f5 into mrdoob:dev Aug 8, 2024
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@WestLangley WestLangley deleted the dev-webgpu_tone_mapping branch August 8, 2024 03:25
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