Cherry-picking 118f4859c472ccbc30b43101c6674dadc81d7b12

And resolve conflicts

resources/shaders/ES/gouraud_light_clip.fs

@@ -0,0 +1,19 @@
+#version 100
+
+precision highp float;
+
+uniform vec4 uniform_color;
+uniform float emission_factor;
+
+// x = tainted, y = specular;
+varying vec2 intensity;
+
+varying float clipping_planes_dot;
+
+void main()
+{
+    if (clipping_planes_dot < 0.0)
+        discard;
+
+    gl_FragColor = vec4(vec3(intensity.y) + uniform_color.rgb * (intensity.x + emission_factor), uniform_color.a);
+}