Fix stuff

client/shaders/nodes_shader/opengl_fragment.glsl

@@ -53,6 +53,8 @@ centroid varying float nightRatio;
 varying highp vec3 eyeVec;
 varying float nightFactor;
 
+#define PI 3.141592653589
+
 #ifdef ENABLE_DYNAMIC_SHADOWS
 #if (MATERIAL_WAVING_LIQUID && defined(ENABLE_WATER_REFLECTIONS))
 vec4 perm(vec4 x)
@@ -526,7 +528,7 @@ void main(void)
 		vec3 reflection_color = mix(vec3(max(fogColor.r, max(fogColor.g, fogColor.b))), fogColor.rgb, f_shadow_strength);
 
 		// Sky reflection
-		col.rgb += reflection_color * pow(fresnel_factor, 2.0) * 0.5 * brightness_factor;
+		col.rgb += reflection_color * pow(fresnel_factor, 2.0) * 0.3 * brightness_factor;
 
 		vec3 water_reflect_color =
 			1.5 * specular_intensity * sunTint * dayLight * fresnel_factor * max(1.0 - shadow_uncorrected, 0.0) *
@@ -539,14 +541,28 @@ void main(void)
 #if (defined(ENABLE_NODE_SPECULAR) && !MATERIAL_WATER_REFLECTIONS)
 		// Apply specular to blocks.
 		if (dot(v_LightDirection, vNormal) < 0.0) {
-			// This intensity is a placeholder and should be replaced by proper specular maps.
-			float intensity = specular_intensity * min(1.0, length(varColor.rgb * base.rgb));
-			const float specular_exponent = 5.0;
-			const float fresnel_exponent =  4.0;
+			// This intensity/roughness is a placeholder and should be replaced by proper specular maps.
+			float intensity = 0.35 * min(1.0, length(varColor.rgb * base.rgb));
+			float roughness = 0.5;
+
+			float rms = 1.0 / (1.0 - roughness) - 1.0;
+			vec3 half_vector = normalize(viewVec + v_LightDirection);
+			const float F0 = 0.04;
+
+			float HV = dot(viewVec, half_vector);
+			float HN = dot(fNormal, half_vector);
+			float VN = dot(viewVec, normalize(fNormal));
+			float LN = dot(v_LightDirection, fNormal);
+
+			float HN2 = HN*HN;
+
+			float beckmann = exp((HN2 - 1.0) / (rms * rms * HN2)) / (PI * rms * rms * HN2*HN2);
+			float geometry = min(min(1.0, 2.0 * HN * VN / HV), 2.0 * HN * LN / HV);
+			float fresnel_schlick = F0 + (1.0 - F0) * pow(1.0 - HV, 5.0);
 
 			col.rgb +=
-				sunTint * intensity * f_shadow_factor * dayLight * (1.0 - nightRatio) * (1.0 - shadow_uncorrected) *
-				pow(max(dot(reflect_ray, viewVec), 0.0), fresnel_exponent) * pow(1.0 - abs(dot(viewVec, fNormal)), specular_exponent);
+				sunTint * specular_intensity * f_shadow_factor * dayLight * (1.0 - nightRatio) * (1.0 - shadow_uncorrected) *
+				intensity * beckmann * geometry * fresnel_schlick / (VN * LN * PI);
 		}
 #endif
 

client/shaders/nodes_shader/opengl_vertex.glsl

@@ -286,7 +286,8 @@ void main(void)
 				(1.0 - mtsmoothstep(0.762, 0.792, f_timeofday));
 			nightFactor = adj_shadow_strength / f_shadow_strength;
 #ifdef ENABLE_TINTED_SUNLIGHT
-			sunTint = mix(vec3(1.0), getDirectLightScatteringAtGround(v_LightDirection), adj_shadow_strength / f_shadow_strength);
+			float tint_strength = 1.0 - mtsmoothstep(0.792, 0.5, f_timeofday) * mtsmoothstep(0.208, 0.5, f_timeofday);
+			sunTint = mix(vec3(1.0), getDirectLightScatteringAtGround(v_LightDirection), nightFactor * tint_strength);
 #endif
 		}
 	}

client/shaders/object_shader/opengl_vertex.glsl

@@ -185,7 +185,10 @@ void main(void)
 			adj_shadow_strength = f_shadow_strength *
 				mtsmoothstep(0.208, 0.238, f_timeofday) *
 				(1.0 - mtsmoothstep(0.762, 0.792, f_timeofday));
-			sunTint = mix(vec3(1.0), getDirectLightScatteringAtGround(v_LightDirection), adj_shadow_strength / f_shadow_strength);
+#ifdef ENABLE_TINTED_SUNLIGHT
+			float tint_strength = 1.0 - mtsmoothstep(0.792, 0.5, f_timeofday) * mtsmoothstep(0.208, 0.5, f_timeofday);
+			sunTint = mix(vec3(1.0), getDirectLightScatteringAtGround(v_LightDirection), nightFactor * tint_strength);
+#endif
 		}
 	}
 #endif

doc/lua_api.md

@@ -8941,9 +8941,11 @@ child will follow movement and rotation of that bone.
             (eg. -1 and 1 is the same saturation and luma, but different hues)
         * This value has no effect on clients who have shaders or post-processing disabled.
       * `foliage_translucency` controls the intensity of the foliage translucency effect (default: `1.5`).
+        * Subject to change and can be removed at any time.
         * This has no effect when dynamic shadows are disabled and on clients who have the "Translucent foliage" effect disabled.
-      * `specular_intensity` controls the intensity of specular highlights on nodes and liquids (default: `1.5`).
-        * This has no effect when dynamic shadows are disabled and on clients who have the "Translucent foliage" effect disabled.
+      * `specular_intensity` controls the intensity of specular highlights on nodes and liquids (default: `0.0`).
+        * Subject to change and can be removed at any time.
+        * This has no effect when dynamic shadows are disabled.
       * `shadows` is a table that controls ambient shadows
         * This has no effect on clients who have the "Dynamic Shadows" effect disabled.
         * `intensity` sets the intensity of the shadows from 0 (no shadows, default) to 1 (blackness)

src/lighting.h

@@ -77,7 +77,7 @@ struct Lighting
 	float saturation {1.0f};
 	float volumetric_light_strength {0.0f};
 	float foliage_translucency{1.5f};
-	float specular_intensity{1.5f};
+	float specular_intensity{0.0f};
 	// These factors are calculated based on expected value of scattering factor of 1e-5
 	// for Nitrogen at 532nm (green), 2e25 molecules/m3 in atmosphere
 	v3f volumetric_beta_r0{ 3.3362176e-01f, 8.753783e-01f, 1.9534237f };