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Merge pull request #116993 from Calinou/doc-decal-orm-reflection

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Document limitations of Decal's ORM texture with various reflection techniques
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Thaddeus Crews 2026-03-06 12:40:08 -06:00
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doc/classes/Decal.xml
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@ -108,6 +108,7 @@
[Texture2D] storing ambient occlusion, roughness, and metallic for the decal. Use this to add extra detail to decals.
[b]Note:[/b] Unlike [BaseMaterial3D] whose filter mode can be adjusted on a per-material basis, the filter mode for [Decal] textures is set globally with [member ProjectSettings.rendering/textures/decals/filter].
[b]Note:[/b] Setting this texture alone will not result in a visible decal, as [member texture_albedo] must also be set. To create an ORM-only decal, load an albedo texture into [member texture_albedo] and set [member albedo_mix] to [code]0.0[/code]. The albedo texture's alpha channel will be used to determine where the underlying surface's ORM map should be overridden (and its intensity).
[b]Note:[/b] Due to technical limitations, modifying the underlying surface's roughness using [member texture_orm] does [i]not[/i] affect screen-space reflections ([member Environment.ssr_enabled]), reflections from [VoxelGI], and reflections from SDFGI ([member Environment.sdfgi_enabled]). Only reflections from [ReflectionProbe]s are affected.
</member>
<member name="upper_fade" type="float" setter="set_upper_fade" getter="get_upper_fade" default="0.3">
Sets the curve over which the decal will fade as the surface gets further from the center of the [AABB]. Only positive values are valid (negative values will be clamped to [code]0.0[/code]). See also [member lower_fade].