5 files changed, 50 insertions, 3 deletions
diff --git a/intern/cycles/kernel/shaders/node_combine_hsv.osl b/intern/cycles/kernel/shaders/node_combine_hsv.osl
index 010773acc5c..574bad30b14 100644
--- a/intern/cycles/kernel/shaders/node_combine_hsv.osl
+++ b/intern/cycles/kernel/shaders/node_combine_hsv.osl
@@ -15,6 +15,7 @@
  */
 
 #include "stdosl.h"
+#include "node_color.h"
 
 shader node_combine_hsv(
 	float H = 0.0,
@@ -22,6 +23,6 @@ shader node_combine_hsv(
 	float V = 0.0,
 	output color Color = 0.8)
 {
-	Color = color("hsv", H, S, V);	
+	Color = color_srgb_to_scene_linear(color("hsv", H, S, V));
 }
 
diff --git a/intern/cycles/kernel/shaders/node_hsv.osl b/intern/cycles/kernel/shaders/node_hsv.osl
index 4722bde4cd7..5f4300ee31d 100644
--- a/intern/cycles/kernel/shaders/node_hsv.osl
+++ b/intern/cycles/kernel/shaders/node_hsv.osl
@@ -35,6 +35,11 @@ shader node_hsv(
 
 	Color = hsv_to_rgb(Color);
 
+	// Clamp color to prevent negative values cauzed by oversaturation.
+	Color[0] = max(Color[0], 0.0);
+	Color[1] = max(Color[1], 0.0);
+	Color[2] = max(Color[2], 0.0);
+
 	ColorOut = mix(ColorIn, Color, Fac);
 }
 
diff --git a/intern/cycles/kernel/shaders/node_normal.osl b/intern/cycles/kernel/shaders/node_normal.osl
index 14af044e0c0..002eddb574c 100644
--- a/intern/cycles/kernel/shaders/node_normal.osl
+++ b/intern/cycles/kernel/shaders/node_normal.osl
@@ -23,6 +23,6 @@ shader node_normal(
 	output float Dot = 1.0)
 {
 	NormalOut = normalize(Direction);
-	Dot = dot(NormalOut, NormalIn);
+	Dot = dot(NormalOut, normalize(NormalIn));
 }
 
diff --git a/intern/cycles/kernel/shaders/node_separate_hsv.osl b/intern/cycles/kernel/shaders/node_separate_hsv.osl
index 94fc5de9122..8bfb04aea1c 100644
--- a/intern/cycles/kernel/shaders/node_separate_hsv.osl
+++ b/intern/cycles/kernel/shaders/node_separate_hsv.osl
@@ -23,7 +23,7 @@ shader node_separate_hsv(
 	output float S = 0.0,
 	output float V = 0.0)
 {
-	color col = rgb_to_hsv(Color);
+	color col = rgb_to_hsv(color_scene_linear_to_srgb(Color));
 	
 	H = col[0];
 	S = col[1];
diff --git a/intern/cycles/kernel/shaders/stdosl.h b/intern/cycles/kernel/shaders/stdosl.h
index 1ff8f363b49..6babe98717c 100644
--- a/intern/cycles/kernel/shaders/stdosl.h
+++ b/intern/cycles/kernel/shaders/stdosl.h
@@ -505,6 +505,47 @@ closure color hair_transmission(normal N, float roughnessu, float roughnessv, ve
 closure color henyey_greenstein(float g) BUILTIN;
 closure color absorption() BUILTIN;
 
+// OSL 1.5 Microfacet functions
+closure color microfacet(string distribution, normal N, vector U, float xalpha, float yalpha, float eta, int refract) {
+	/* GGX */
+	if (distribution == "ggx" || distribution == "default") {
+		if (!refract) {
+			if (xalpha == yalpha) {
+				/* Isotropic */
+				return microfacet_ggx(N, xalpha);
+			}
+			else {
+				/* Anisotropic */
+				return microfacet_ggx_aniso(N, U, xalpha, yalpha);
+			}
+		}
+		else {
+			return microfacet_ggx_refraction(N, xalpha, eta);
+		}
+	}
+	/* Beckmann */
+	else {
+		if (!refract) {
+			if (xalpha == yalpha) {
+				/* Isotropic */
+				return microfacet_beckmann(N, xalpha);
+			}
+			else {
+				/* Anisotropic */
+				return microfacet_beckmann_aniso(N, U, xalpha, yalpha);
+			}
+		}
+		else {
+			return microfacet_beckmann_refraction(N, xalpha, eta);
+		}
+	}
+}
+
+closure color microfacet (string distribution, normal N, float alpha, float eta, int refract) {
+	return microfacet(distribution, N, vector(0), alpha, alpha, eta, refract);
+}
+
+
 // Renderer state
 int backfacing () BUILTIN;
 int raytype (string typename) BUILTIN;