Added starfield backdrop to instancing example

data/shaders/instancing/instancing.frag

@@ -20,7 +20,7 @@ void main()
 	vec3 L = normalize(inLightVec);
 	vec3 V = normalize(inViewVec);
 	vec3 R = reflect(-L, N);
-	vec3 diffuse = max(dot(N, L), 0.0) * inColor;
+	vec3 diffuse = max(dot(N, L), 0.1) * inColor;
 	vec3 specular = (dot(N,L) > 0.0) ? pow(max(dot(R, V), 0.0), 16.0) * vec3(0.75) * color.r : vec3(0.0);
 	outFragColor = vec4(diffuse * color.rgb + specular, 1.0);		
 }

data/shaders/instancing/starsphere.frag

@@ -0,0 +1,34 @@
+#version 450
+
+layout (location = 0) in vec3 inUVW;
+
+layout (location = 0) out vec4 outFragColor;
+
+#define HASHSCALE3 vec3(443.897, 441.423, 437.195)
+#define STARFREQUENCY 0.01
+
+// Hash function by Dave Hoskins (https://www.shadertoy.com/view/4djSRW)
+float hash33(vec3 p3)
+{
+	p3 = fract(p3 * HASHSCALE3);
+	p3 += dot(p3, p3.yxz+vec3(19.19));
+	return fract((p3.x + p3.y)*p3.z + (p3.x+p3.z)*p3.y + (p3.y+p3.z)*p3.x);
+}
+
+vec3 starField(vec3 pos)
+{
+	vec3 color = vec3(0.0);
+	float threshhold = (1.0 - STARFREQUENCY);
+	float rnd = hash33(pos);
+	if (rnd >= threshhold)
+	{
+		float starCol = pow((rnd - threshhold) / (1.0 - threshhold), 16.0);
+		color += vec3(starCol);
+	}	
+	return color;
+}
+
+void main() 
+{
+	outFragColor = vec4(starField(inUVW), 1.0);
+}

data/shaders/instancing/starsphere.vert

@@ -0,0 +1,9 @@
+#version 450
+
+layout (location = 0) out vec3 outUVW;
+
+void main() 
+{
+	outUVW = vec3((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2, gl_VertexIndex & 2);
+	gl_Position = vec4(outUVW.st * 2.0f - 1.0f, 0.0f, 1.0f);
+}