Adjust celestial body intensity and god rays input based on horizon visibility

src/runtime-three/runtime-host.ts

@@ -101,6 +101,7 @@ import {
 } from "../rendering/world-shader-sky";
 import {
   resolveWorldCelestialBodiesState,
+  resolveWorldCelestialHorizonVisibility,
   resolveWorldEnvironmentState,
   WorldBackgroundRenderer
 } from "../rendering/world-background-renderer";
@@ -2908,21 +2909,47 @@ export class RuntimeHost {
             shaderSkyState.celestial.sunVisible
               ? {
                   colorHex: shaderSkyState.celestial.sunColorHex,
-                  intensity: shaderSkyState.celestial.sunIntensity,
+                  intensity:
+                    shaderSkyState.celestial.sunIntensity *
+                    resolveWorldCelestialHorizonVisibility(
+                      shaderSkyState.celestial.sunDirection.y,
+                      shaderSkyState.sky.horizonHeight
+                    ),
                   direction: shaderSkyState.celestial.sunDirection
                 }
               : null,
             shaderSkyState.celestial.moonVisible
               ? {
                   colorHex: shaderSkyState.celestial.moonColorHex,
-                  intensity: shaderSkyState.celestial.moonIntensity,
+                  intensity:
+                    shaderSkyState.celestial.moonIntensity *
+                    resolveWorldCelestialHorizonVisibility(
+                      shaderSkyState.celestial.moonDirection.y,
+                      shaderSkyState.sky.horizonHeight
+                    ),
                   direction: shaderSkyState.celestial.moonDirection
                 }
               : null
           )
         : resolveDominantScreenSpaceGodRaysLightInput(
-            celestialBodiesState.sun,
+            celestialBodiesState.sun === null
-            celestialBodiesState.moon
+              ? null
+              : {
+                  colorHex: celestialBodiesState.sun.colorHex,
+                  direction: celestialBodiesState.sun.direction,
+                  intensity:
+                    celestialBodiesState.sun.intensity *
+                    celestialBodiesState.sun.horizonVisibility
+                },
+            celestialBodiesState.moon === null
+              ? null
+              : {
+                  colorHex: celestialBodiesState.moon.colorHex,
+                  direction: celestialBodiesState.moon.direction,
+                  intensity:
+                    celestialBodiesState.moon.intensity *
+                    celestialBodiesState.moon.horizonVisibility
+                }
           );
     syncScreenSpaceGodRaysLightSource(
       this.godRaysLightSource,