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Document some glow properties being unavailable with Compatibility #9041

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Mar 2, 2024
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Document some glow properties being unavailable with Compatibility #9041

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11 changes: 9 additions & 2 deletions tutorials/3d/environment_and_post_processing.rst
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Expand Up @@ -552,8 +552,15 @@ illumination for off-screen elements (unlike :abbr:`SSIL (Screen-Space Indirect
Glow
^^^^

*This feature is only available when using the Forward+ and Mobile backends, not
Compatibility.*
.. note::

When using the Compatibility rendering method, glow uses a different
implementation with some properties being unavailable and hidden from the
inspector: **Levels**, **Normalized**, **Strength**, **Blend Mode**,
**Mix**, **Map**, and **Map Strength**.

This implementation is optimized to run on low-end devices and is less
flexible as a result.

In photography and film, when light amount exceeds the maximum *luminance*
(brightness) supported by the media, it generally bleeds outwards to darker
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