HDRP: Update default value of emissiveColor

com.unity.render-pipelines.high-definition/HDRP/Material/LayeredLit/LayeredLit.shader

 
         [ToggleUI]  _EnableSpecularOcclusion("Enable specular occlusion", Float) = 0.0
 
-        [HDR] _EmissiveColor("EmissiveColor", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
         [ToggleUI] _AlbedoAffectEmissive("Albedo Affect Emissive", Float) = 0.0
 

com.unity.render-pipelines.high-definition/HDRP/Material/LayeredLit/LayeredLitTessellation.shader

 
         [ToggleUI]  _EnableSpecularOcclusion("Enable specular occlusion", Float) = 0.0
 
-        [HDR] _EmissiveColor("EmissiveColor", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
         [ToggleUI] _AlbedoAffectEmissive("Albedo Affect Emissive", Float) = 0.0
 

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/Lit.shader

         // These option below will cause different compilation flag.
         [ToggleUI]  _EnableSpecularOcclusion("Enable specular occlusion", Float) = 0.0
 
-        [HDR] _EmissiveColor("EmissiveColor", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
         [ToggleUI] _AlbedoAffectEmissive("Albedo Affect Emissive", Float) = 0.0
 

com.unity.render-pipelines.high-definition/HDRP/Material/Lit/LitTessellation.shader

         // These option below will cause different compilation flag.
         [ToggleUI]  _EnableSpecularOcclusion("Enable specular occlusion", Float) = 0.0
 
-        [HDR] _EmissiveColor("EmissiveColor", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
         [ToggleUI] _AlbedoAffectEmissive("Albedo Affect Emissive", Float) = 0.0
 

com.unity.render-pipelines.high-definition/HDRP/Material/StackLit/StackLit.shader

         [HideInInspector] _AmbientOcclusionRange("AmbientOcclusion Range", Vector) = (0, 1, 0, 0)
 
         [HideInInspector] _EmissiveColorMapShow("Emissive Color Map Show", Float) = 0.0
-        _EmissiveColor("Emissive Color", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("Emissive Color Map", 2D) = "white" {}
         _EmissiveColorMapUV("Emissive Color Map UV", Range(0.0, 1.0)) = 0
         _EmissiveColorMapUVLocal("Emissive Color Map UV Local", Float) = 0.0

com.unity.render-pipelines.high-definition/HDRP/Material/Unlit/Unlit.shader

         _UnlitColor("Color", Color) = (1,1,1,1)
         _UnlitColorMap("ColorMap", 2D) = "white" {}
 
-        [HDR] _EmissiveColor("EmissiveColor", Color) = (1, 1, 1)
+        [HDR] _EmissiveColor("EmissiveColor", Color) = (0, 0, 0)
         _EmissiveColorMap("EmissiveColorMap", 2D) = "white" {}
 
         _DistortionVectorMap("DistortionVectorMap", 2D) = "black" {}