Use Blinn Phong model.

data/shaders/pointlight.frag

@@ -14,36 +14,34 @@ out vec4 Specular;
 
 vec3 DecodeNormal(vec2 n);
 
-void main() {
-	vec2 texc = gl_FragCoord.xy / screen;
-	float z = texture(dtex, texc).x;
-	vec3 norm = normalize(DecodeNormal(2. * texture(ntex, texc).xy - 1.));
+void main()
+{
+    vec2 texc = gl_FragCoord.xy / screen;
+    float z = texture(dtex, texc).x;
+    vec3 norm = normalize(DecodeNormal(2. * texture(ntex, texc).xy - 1.));
+    //float roughness = texture(ntex, texc).z;
 
-	vec4 xpos = 2.0 * vec4(texc, z, 1.0) - 1.0f;
-	xpos = invproj * xpos;
-	xpos /= xpos.w;
-	vec3 eyedir = normalize(xpos.xyz);
+    vec4 xpos = 2.0 * vec4(texc, z, 1.0) - 1.0f;
+    xpos = invproj * xpos;
+    xpos /= xpos.w;
+    vec3 eyedir = -normalize(xpos.xyz);
 
-	vec3 diffuse = vec3(0.), specular = vec3(0.);
+    vec4 pseudocenter = ViewMatrix * vec4(center.xyz, 1.0);
+    pseudocenter /= pseudocenter.w;
+    vec3 light_pos = pseudocenter.xyz;
+    vec3 light_col = col.xyz;
+    float d = distance(light_pos, xpos.xyz);
+    float att = energy * 200. / (4. * 3.14 * d * d);
+    float spec_att = (energy + 10.) * 200. / (4. * 3.14 * d * d);
 
-	vec4 pseudocenter = ViewMatrix * vec4(center.xyz, 1.0);
-	pseudocenter /= pseudocenter.w;
-	vec3 light_pos = pseudocenter.xyz;
-	vec3 light_col = col.xyz;
-	float d = distance(light_pos, xpos.xyz);
-	float att = energy * 200. / (4. * 3.14 * d * d);
-	float spec_att = (energy + 10.) * 200. / (4. * 3.14 * d * d);
+    // Light Direction
+    vec3 L = -normalize(xpos.xyz - light_pos);
+    // Half Light View direction
+    vec3 H = normalize(eyedir + L);
 
-	// Light Direction
-	vec3 L = normalize(xpos.xyz - light_pos);
+    float NdotL = max(0., dot(norm, L));
+    float NdotH = max(0., dot(norm, H));
 
-	float NdotL = max(0.0, dot(norm, -L));
-	diffuse += NdotL * light_col * att;
-	// Reflected light dir
-	vec3 R = reflect(-L, norm);
-	float RdotE = max(0.0, dot(R, eyedir));
-	specular += pow(RdotE, spec) * light_col * spec_att;
-
-	Diffuse = vec4(diffuse, 1.);
-	Specular = vec4(specular , 1.);
+    Diffuse = vec4(NdotL * light_col * att, 1.);
+    Specular = vec4(pow(NdotH, spec) * light_col * NdotL * spec_att, 1.);
 }

data/shaders/sunlight.frag

@@ -36,14 +36,17 @@ void main() {
 	}
 
 	vec3 norm = normalize(DecodeNormal(2. * texture(ntex, uv).xy - 1.));
+    vec3 eyedir = -normalize(xpos.xyz);
 
 	// Normalized on the cpu
-	vec3 L = direction;
+    vec3 L = direction;
+    // Half Light View direction
+    vec3 H = normalize(eyedir + L);
 
-	float NdotL = max(0.0, dot(norm, L));
-	vec3 R = reflect(L, norm);
-	float RdotE = max(0.0, dot(R, normalize(xpos.xyz)));
-	float Specular = pow(RdotE, 200);
+    float NdotL = max(0., dot(norm, L));
+    float NdotH = max(0., dot(norm, H));
+
+	float Specular = pow(NdotH, 200) * NdotL;
 
 	vec3 outcol = NdotL * col;
 

data/shaders/sunlightshadow.frag

@@ -64,14 +64,17 @@ void main() {
 	xpos.xyz /= xpos.w;
 
 	vec3 norm = normalize(DecodeNormal(2. * texture(ntex, uv).xy - 1.));
+    vec3 eyedir = -normalize(xpos.xyz);
 
 	// Normalized on the cpu
-	vec3 L = direction;
+    vec3 L = direction;
+    // Half Light View direction
+    vec3 H = normalize(eyedir + L);
 
-	float NdotL = max(0.0, dot(norm, L));
-	vec3 R = reflect(L, norm);
-	float RdotE = max(0.0, dot(R, normalize(xpos.xyz)));
-	float Specular = pow(RdotE, 200);
+    float NdotL = max(0., dot(norm, L));
+    float NdotH = max(0., dot(norm, H));
+
+	float Specular = pow(NdotH, 200) * NdotL;
 
 	vec3 outcol = NdotL * col;