renderer -> renderergl1, rend2 -> renderergl2

code/renderergl2/glsl/fogpass_fp.glsl

@@ -0,0 +1,9 @@
+uniform vec4  u_Color;
+
+varying float var_Scale;
+
+void main()
+{
+	gl_FragColor = u_Color;
+	gl_FragColor.a *= sqrt(clamp(var_Scale, 0.0, 1.0));
+}