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Add Filament lighting and shadow features and fixes.

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- Add a hidden directional light to Filament scenes with no lights to work around soft shadow blackout bug.
- Respect quality/shadowsize as default shadow map resolution.
- Interpret light/bulbradius in correct units for each shadow type and update XML reference docs.
- Support updating the shadow map resolution of live Filament lights.
- Clamp light intensities to non-negative values in the Filament debug panel.

PiperOrigin-RevId: 957305808
Change-Id: Ic7a3430aaa3b117be7fbb7ace836d68e54cdf65a
This commit is contained in:
Yuval Tassa
2026-07-31 13:27:31 -07:00
committed by Copybara-Service
parent 0ca53dacf8
commit 7bc1aa9b05
11 changed files with 141 additions and 13 deletions
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doc/XMLreference.rst
+2 -2
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@@ -3301,8 +3301,8 @@ Attributes may be applied or ignored depending on the lighting model being used.
.. _body-light-bulbradius:
:at:`bulbradius`: :at-val:`real, "0.02"`
The radius of the light source which can affect shadow softness depending on the
renderer. This only applies to spotlights.
The radius of the light-emitting surface. Larger radii produce softer shadows in renderers that
support soft shadows. Ignored by the classic renderer.
.. _body-light-attenuation: