From 6759d09ecac8a15f709ced76a03c73c2f0de13c9 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Tue, 28 Apr 2026 14:27:34 +0200
Subject: [PATCH] Apply celestial light horizon fading logic to day/night state

---
 src/runtime-three/runtime-project-time.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/runtime-three/runtime-project-time.ts b/src/runtime-three/runtime-project-time.ts
index 7d0c1fb0..0e2ee6ef 100644
--- a/src/runtime-three/runtime-project-time.ts
+++ b/src/runtime-three/runtime-project-time.ts
@@ -993,7 +993,12 @@ export function resolveRuntimeDayNightWorldState(
       timeOfDay.dusk.lightIntensityFactor,
       0,
       phaseWeights
-    ) * smoothstep(-0.16, 0.18, sunDirection.y);
+    ) *
+    smoothstep(
+      CELESTIAL_LIGHT_HORIZON_FADE_START,
+      CELESTIAL_LIGHT_HORIZON_FADE_END,
+      sunDirection.y
+    );
   const ambientFactor = blendScalarByWeights(
     1,
     timeOfDay.dawn.ambientIntensityFactor,