yes

modules/wallpaper-engine/shaders/downsample_quarter.frag

@@ -0,0 +1,14 @@
+
+varying vec2 v_TexCoord[4];
+
+uniform sampler2D g_Texture0;
+
+void main() {
+	vec3 albedo = texSample2D(g_Texture0, v_TexCoord[0]).rgb +
+					texSample2D(g_Texture0, v_TexCoord[1]).rgb +
+					texSample2D(g_Texture0, v_TexCoord[2]).rgb +
+					texSample2D(g_Texture0, v_TexCoord[3]).rgb;
+	albedo *= 0.25;
+
+	gl_FragColor = vec4(albedo, 1.0);
+}