diff --git a/build.gradle b/build.gradle
index 4494f28aad..d09ef15d71 100644
--- a/build.gradle
+++ b/build.gradle
@@ -244,6 +244,12 @@ project(":tools"){
 
     dependencies{
         compile project(":core")
+
+        //for render tests
+        compile "com.badlogicgames.gdx:gdx-platform:$gdxVersion:natives-desktop"
+        compile "com.badlogicgames.gdx:gdx-freetype-platform:$gdxVersion:natives-desktop"
+
+        compile arcModule("backends:backend-lwjgl3")
     }
 }
 
diff --git a/tools/build.gradle b/tools/build.gradle
index 9afe633290..3b18ef99a7 100644
--- a/tools/build.gradle
+++ b/tools/build.gradle
@@ -351,6 +351,17 @@ task antialiasGen(){
     }
 }
 
+task testUpscale(dependsOn: classes, type: JavaExec){
+
+    if(System.getProperty("os.name").toLowerCase().contains("mac")){
+        jvmArgs "-XstartOnFirstThread"
+    }
+    main = "io.anuke.mindustry.Upscaler"
+    classpath = sourceSets.main.runtimeClasspath
+    standardInput = System.in
+    workingDir = "../core/assets/"
+}
+
 task genSprites(dependsOn: classes, type: JavaExec){
     finalizedBy 'antialiasGen'
 
diff --git a/tools/src/io/anuke/mindustry/SquareMarcher.java b/tools/src/io/anuke/mindustry/SquareMarcher.java
index b25ad65443..ee755e8469 100644
--- a/tools/src/io/anuke/mindustry/SquareMarcher.java
+++ b/tools/src/io/anuke/mindustry/SquareMarcher.java
@@ -1,7 +1,8 @@
 package io.anuke.mindustry;
 
+import io.anuke.arc.Core;
 import io.anuke.arc.files.FileHandle;
-import io.anuke.arc.graphics.Pixmap;
+import io.anuke.arc.graphics.*;
 import io.anuke.arc.graphics.g2d.*;
 import io.anuke.arc.graphics.glutils.FrameBuffer;
 import io.anuke.arc.util.*;
@@ -16,7 +17,7 @@ public class SquareMarcher{
         for(int x = 0; x < pixmap.getWidth(); x++){
             for(int y = 0; y < pixmap.getHeight(); y++){
                 Tmp.c1.set(pixmap.getPixel(x, y));
-                grid[x][pixmap.getHeight() - 1 - y] = Tmp.c1.a > 0.01f;
+                grid[x][y] = Tmp.c1.a > 0.01f;
             }
         }
 
@@ -24,6 +25,8 @@ public class SquareMarcher{
         Draw.proj().setOrtho(0, 0, resolution, resolution);
 
         buffer.begin();
+        Core.graphics.clear(Color.BLACK);
+        Draw.color(Color.WHITE);
         float xscl = resolution / (float)pixmap.getWidth(), yscl = resolution / (float)pixmap.getHeight();
         float scl = xscl;
 
@@ -167,6 +170,7 @@ public class SquareMarcher{
             }
         }
 
+        Draw.flush();
         ScreenUtils.saveScreenshot(file, 0, 0, resolution, resolution);
         buffer.end();
     }
diff --git a/tools/src/io/anuke/mindustry/Upscaler.java b/tools/src/io/anuke/mindustry/Upscaler.java
new file mode 100644
index 0000000000..f409035533
--- /dev/null
+++ b/tools/src/io/anuke/mindustry/Upscaler.java
@@ -0,0 +1,32 @@
+package io.anuke.mindustry;
+
+import io.anuke.arc.*;
+import io.anuke.arc.backends.lwjgl3.*;
+import io.anuke.arc.files.FileHandle;
+import io.anuke.arc.graphics.Pixmap;
+import io.anuke.arc.util.Log;
+import io.anuke.mindustry.game.EventType.GameLoadEvent;
+
+public class Upscaler{
+
+    public static void main(String[] args){
+        Events.on(GameLoadEvent.class, e -> scale());
+        new Lwjgl3Application(new Mindustry(), new Lwjgl3ApplicationConfiguration());
+    }
+
+    static void scale(){
+        FileHandle file = Core.files.local("../assets-raw/sprites/ui/icons");
+
+        SquareMarcher marcher = new SquareMarcher();
+
+        for(FileHandle img : file.list()){
+            if(img.extension().equals("png")){
+                marcher.render(new Pixmap(img), Core.files.external("images/").child(img.name()));
+            }
+        }
+
+        Log.info("done.");
+
+        Core.app.exit();
+    }
+}