Cycles: color space control for image/environment texture nodes. Ideally would

be automated but need to think about how to do this, not so simply in a node
system. But guideline for now is, for color textures set to sRGB, for things like
bump or roughness map, set to Linear.

intern/cycles/kernel/osl/nodes/node_environment_texture.osl

@@ -21,8 +21,12 @@
 shader node_environment_texture(
 	vector Vector = P,
 	string filename = "",
+	string color_space = "sRGB",
 	output color Color = color(0.0, 0.0, 0.0))
 {
 	Color = (color)environment(filename, Vector);
+
+	if(color_space == "sRGB")
+		Color = color_srgb_to_scene_linear(Color);
 }