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Update emission_luminance soft-max to 2000 nits. - #285

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jamportz wants to merge 3 commits into
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jamportz:emission_luminance_softmax
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jamportz wants to merge 3 commits into
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jamportz:emission_luminance_softmax

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@jamportz

@jamportz jamportz commented Dec 8, 2025 •

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Changes as below.

Note that it seems the MaterialX file didn't have the correct emission_luminance default of 1000 nits, so this PR fixes that up also.

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The soft-max bump to $[0, 2000]$ is applied consistently in index.html, parametrization.md.html, and uisoftmax. Aligning the nodedef default from 0.0 to 1000.0 matches the spec table.

Graphs that turn on emission_weight without setting luminance will now emit 1000 nits instead of 0 — worth a release note.

Resolve conflicts in the emission parameter tables: keep the 2000 nit
emission_luminance soft max from this branch, and the [0, inf)^3 range and
'Emission color multiplier' description of emission_color from dev_1.2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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