Complete code re-work 'Getting Started' tutorials.

src/1.getting_started/4.2.textures_combined/4.2.texture.fs

@@ -0,0 +1,15 @@
+#version 330 core
+out vec4 fragColor;
+
+in vec3 ourColor;
+in vec2 texCoord;
+
+// texture samplers
+uniform sampler2D texture1;
+uniform sampler2D texture2;
+
+void main()
+{
+	// linearly interpolate between both textures (80% container, 20% awesomeface)
+	fragColor = mix(texture(texture1, texCoord), texture(texture2, texCoord), 0.2);
+}