Variable skyFragmentShaderConst
skyFragmentShader: "\n uniform float uTime;\n uniform float uSunIntensity;\n uniform float uSunAngle;\n uniform float uAmbientLight;\n uniform float uStarVisibility;\n uniform float uFogDensity;\n uniform float uWeatherIntensity;\n uniform vec2 uGyroTilt;\n \n varying vec2 vUv;\n varying vec3 vPosition;\n \n // Simple noise for stars\n float hash(vec2 p) {\n return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453);\n }\n \n // Sky gradient based on time of day\n vec3 getSkyColor(float height) {\n // Day sky: blue gradient\n vec3 daySkyTop = vec3(0.4, 0.6, 0.9);\n vec3 daySkyHorizon = vec3(0.7, 0.8, 0.95);\n \n // Night sky: dark blue/black\n vec3 nightSkyTop = vec3(0.01, 0.01, 0.05);\n vec3 nightSkyHorizon = vec3(0.1, 0.1, 0.2);\n \n // Interpolate based on sun intensity\n vec3 skyTop = mix(nightSkyTop, daySkyTop, uSunIntensity);\n vec3 skyHorizon = mix(nightSkyHorizon, daySkyHorizon, uSunIntensity);\n \n return mix(skyHorizon, skyTop, height);\n }\n \n void main() {\n // Apply gyroscopic tilt to UV\n vec2 adjustedUv = vUv + uGyroTilt;\n \n // Calculate height with horizon adjustment\n float height = adjustedUv.y;\n \n // Base sky color\n vec3 skyColor = getSkyColor(height);\n \n // Add stars at night\n if (uStarVisibility > 0.0) {\n float starNoise = hash(floor(adjustedUv * 200.0));\n if (starNoise > 0.995) {\n float starBrightness = (starNoise - 0.995) * 200.0;\n skyColor += vec3(starBrightness) * uStarVisibility;\n }\n }\n \n // Add sun glow\n if (uSunIntensity > 0.0) {\n float sunY = (uSunAngle / 180.0); // 0 to 1\n float distToSun = distance(adjustedUv, vec2(0.5, sunY));\n float sunGlow = smoothstep(0.2, 0.0, distToSun) * uSunIntensity;\n skyColor += vec3(1.0, 0.9, 0.7) * sunGlow;\n }\n \n // Weather effects (fog/clouds)\n if (uWeatherIntensity > 0.0) {\n float cloudNoise = hash(floor(adjustedUv * 10.0 + vec2(uTime * 0.1)));\n vec3 cloudColor = vec3(0.8, 0.8, 0.85);\n skyColor = mix(skyColor, cloudColor, cloudNoise * uWeatherIntensity * 0.5);\n }\n \n // Apply fog density\n if (uFogDensity > 0.0) {\n vec3 fogColor = vec3(0.9, 0.9, 0.95);\n skyColor = mix(skyColor, fogColor, uFogDensity * (1.0 - height));\n }\n \n // Apply ambient lighting\n skyColor *= (0.5 + uAmbientLight * 0.5);\n \n gl_FragColor = vec4(skyColor, 1.0);\n }\n" = ...