SL-4: fix over-dark arena - rebalance lighting for clarity

The first pass crushed readability ('can't see anything'): dark ground x low ambient x dim sun x +12 contrast (clipped everything below midtone to black) x vignette x dark fog. Rebalanced toward legibility while keeping the dark-frontier mood: ColorAdjustments contrast 12->4 (the main fix), post-exposure 0.55->0.85, saturation 0->4; sun 0.9->1.5 cool-white; ambient intensity 0.62->1.0 with lifted cool ambient colors; vignette 0.32->0.20; ground material lifted ~18%->~28% value; fog pushed out (start 18->26, end 42->60); Core beacon range 9->13. Ground, player silhouette, Ore ring and shadows now all read; Core stays the bright cyan peak.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/Scenes/Game.unity

@@ -15,15 +15,15 @@ RenderSettings:
   m_ObjectHideFlags: 0
   serializedVersion: 10
   m_Fog: 1
-  m_FogColor: {r: 0.05, g: 0.07, b: 0.075, a: 1}
+  m_FogColor: {r: 0.07, g: 0.09, b: 0.1, a: 1}
   m_FogMode: 1
   m_FogDensity: 0.006
-  m_LinearFogStart: 18
-  m_LinearFogEnd: 42
-  m_AmbientSkyColor: {r: 0.085, g: 0.1, b: 0.12, a: 1}
-  m_AmbientEquatorColor: {r: 0.065, g: 0.075, b: 0.085, a: 1}
-  m_AmbientGroundColor: {r: 0.045, g: 0.05, b: 0.055, a: 1}
-  m_AmbientIntensity: 0.62
+  m_LinearFogStart: 26
+  m_LinearFogEnd: 60
+  m_AmbientSkyColor: {r: 0.2, g: 0.24, b: 0.29, a: 1}
+  m_AmbientEquatorColor: {r: 0.15, g: 0.17, b: 0.19, a: 1}
+  m_AmbientGroundColor: {r: 0.1, g: 0.11, b: 0.12, a: 1}
+  m_AmbientIntensity: 1
   m_AmbientMode: 1
   m_SubtractiveShadowColor: {r: 0.42, g: 0.478, b: 0.627, a: 1}
   m_SkyboxMaterial: {fileID: 2100000, guid: e1cd63d2feef80f45a168f477934722f, type: 2}
@@ -11789,8 +11789,8 @@ Light:
   m_Enabled: 1
   serializedVersion: 13
   m_Type: 1
-  m_Color: {r: 0.8, g: 0.85, b: 1, a: 1}
-  m_Intensity: 0.9
+  m_Color: {r: 0.92, g: 0.94, b: 1, a: 1}
+  m_Intensity: 1.5
   m_Range: 10
   m_SpotAngle: 30
   m_InnerSpotAngle: 21.80208
@@ -35381,8 +35381,8 @@ Light:
   serializedVersion: 13
   m_Type: 2
   m_Color: {r: 0.25, g: 0.85, b: 1, a: 1}
-  m_Intensity: 3
-  m_Range: 9
+  m_Intensity: 3.5
+  m_Range: 13
   m_SpotAngle: 30
   m_InnerSpotAngle: 21.80208
   m_CookieSize2D: {x: 0.5, y: 0.5}
@@ -45035,9 +45035,9 @@ MonoBehaviour:
   m_EditorClassIdentifier: ProjectM.Client::ProjectM.Client.WorldAtmosphereConfig
   BoundaryX: 500
   BlendHalfWidth: 80
-  BaseFogColor: {r: 0.05, g: 0.07, b: 0.075, a: 1}
+  BaseFogColor: {r: 0.07, g: 0.09, b: 0.1, a: 1}
   BaseFogDensity: 0.006
-  BaseAmbientSky: {r: 0.085, g: 0.1, b: 0.12, a: 1}
+  BaseAmbientSky: {r: 0.2, g: 0.24, b: 0.29, a: 1}
   ExpeditionFogColor: {r: 0.8509804, g: 0.54901963, b: 0.22745098, a: 1}
   ExpeditionFogDensity: 0.01
   ExpeditionAmbientSky: {r: 0.91, g: 0.769, b: 0.604, a: 1}

Assets/Synty/PolygonNatureBiomes/PNB_Meadow_Forest/Terrain/Mat_Grass_Textures_01.mat

@@ -132,8 +132,8 @@ Material:
     - _XRMotionVectorsPass: 1
     - _ZWrite: 1
     m_Colors:
-    - _BaseColor: {r: 0.165, g: 0.205, b: 0.185, a: 1}
-    - _Color: {r: 0.16499996, g: 0.20499995, b: 0.18499997, a: 1}
+    - _BaseColor: {r: 0.24, g: 0.29, b: 0.27, a: 1}
+    - _Color: {r: 0.23999995, g: 0.28999996, b: 0.26999995, a: 1}
     - _EmissionColor: {r: 0, g: 0, b: 0, a: 1}
     - _SpecColor: {r: 0.19999996, g: 0.19999996, b: 0.19999996, a: 1}
   m_BuildTextureStacks: []

Assets/_Project/Rendering/PostFX_Daylight.asset

@@ -111,7 +111,7 @@ MonoBehaviour:
     m_Value: {x: 0.5, y: 0.5}
   intensity:
     m_OverrideState: 1
-    m_Value: 0.32
+    m_Value: 0.2
   smoothness:
     m_OverrideState: 1
     m_Value: 0.4
@@ -151,10 +151,10 @@ MonoBehaviour:
   active: 1
   postExposure:
     m_OverrideState: 1
-    m_Value: 0.55
+    m_Value: 0.85
   contrast:
     m_OverrideState: 1
-    m_Value: 12
+    m_Value: 4
   colorFilter:
     m_OverrideState: 1
     m_Value: {r: 0.93, g: 0.96, b: 1, a: 1}
@@ -163,7 +163,7 @@ MonoBehaviour:
     m_Value: 0
   saturation:
     m_OverrideState: 1
-    m_Value: 0
+    m_Value: 4
 --- !u!114 &7928249266562162677
 MonoBehaviour:
   m_ObjectHideFlags: 3