leenkx/Shaders/water_pass/water_pass.frag.glsl

@@ -228,12 +228,16 @@ void main() {
 	// Blinn-Phong specular using half-vector, faded at horizon
 	vec3 h = normalize(v + ld);
 	float specAmount = pow(max(dot(n2, h), 0.0), 200.0) * (200.0 + 8.0) / (PI * 8.0);
-	fragColor.rgb += specAmount * (isSky ? 0.3 : 1.0) * horizonFactor;
+	fragColor.rgb += specAmount * (isSky ? 0.3 : 1.0);
 	// Depth fog - blend toward waterColor with depth, faded at horizon
 	float depthFog = clamp(-(geomZ - waterLevel) * waterDensity, 0.0, 0.9);
 	fragColor.rgb = mix(fragColor.rgb, waterColor, depthFog * horizonFactor);
 	// Alpha fades smoothly at horizon instead of hard cut
-	fragColor.a = isSky ? horizonFactor : clamp(abs(geomZ - waterLevel) * 5.0, 0.0, 1.0);
+	// Skydome sits 3.5 below the camera (_skydomeMatrix), so its horizon
+	// appears where the ray z reaches -3.5 / domeRadius
+	float farPlane = cameraProj.y / (1.0 - cameraProj.x);
+	float horizonFade = clamp((-3.5 / (farPlane * 0.95) - vray.z) * 20.0, 0.0, 1.0);
+	fragColor.a = isSky ? horizonFade : clamp(abs(geomZ - waterLevel) * 5.0, 0.0, 1.0);
 
 	// Foam - based on actual geometry depth below water surface
 	float fd = isSky ? 1.0 : abs(geomZ - waterLevel);