diff --git a/core/src/main/java/com/boydti/fawe/util/MainUtil.java b/core/src/main/java/com/boydti/fawe/util/MainUtil.java
index d955036f..8046c221 100644
--- a/core/src/main/java/com/boydti/fawe/util/MainUtil.java
+++ b/core/src/main/java/com/boydti/fawe/util/MainUtil.java
@@ -31,6 +31,7 @@ import java.util.Map.Entry;
 import java.util.concurrent.ForkJoinPool;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicLong;
+import java.util.function.Consumer;
 import java.util.regex.Pattern;
 import java.util.zip.*;
 import javax.imageio.ImageIO;
@@ -885,7 +886,7 @@ public class MainUtil {
         return isInSubDirectory(dir, file.getParentFile());
     }
 
-    public static void iterateFiles(File directory, RunnableVal<File> task) {
+    public static void iterateFiles(File directory, Consumer<File> task) {
         if (directory.exists()) {
             File[] files = directory.listFiles();
             if (null != files) {
@@ -893,7 +894,7 @@ public class MainUtil {
                     if (files[i].isDirectory()) {
                         iterateFiles(files[i], task);
                     } else {
-                        task.run(files[i]);
+                        task.accept(files[i]);
                     }
                 }
             }
diff --git a/core/src/main/java/com/boydti/fawe/util/image/ImageUtil.java b/core/src/main/java/com/boydti/fawe/util/image/ImageUtil.java
index 98e77597..c903cc3a 100644
--- a/core/src/main/java/com/boydti/fawe/util/image/ImageUtil.java
+++ b/core/src/main/java/com/boydti/fawe/util/image/ImageUtil.java
@@ -37,14 +37,14 @@ public class ImageUtil {
         }
         int type = (img.getTransparency() == Transparency.OPAQUE) ?
                 BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB;
-        BufferedImage ret = (BufferedImage)img;
+        BufferedImage ret = img;
         int w, h;
         if (higherQuality) {
             // Use multi-step technique: start with original size, then
             // scale down in multiple passes with drawImage()
             // until the target size is reached
-            w = img.getWidth();
-            h = img.getHeight();
+            w = ret.getWidth();
+            h = ret.getHeight();
         } else {
             // Use one-step technique: scale directly from original
             // size to target size with a single drawImage() call
@@ -58,14 +58,14 @@ public class ImageUtil {
                 if (w < targetWidth) {
                     w = targetWidth;
                 }
-            }
+            } else if (w < targetWidth) w = targetWidth;
 
             if (higherQuality && h > targetHeight) {
                 h /= 2;
                 if (h < targetHeight) {
                     h = targetHeight;
                 }
-            }
+            } else if (h < targetHeight) h = targetHeight;
 
             BufferedImage tmp = new BufferedImage(w, h, type);
             Graphics2D g2 = tmp.createGraphics();
diff --git a/core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java b/core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java
index d8178037..7e919053 100644
--- a/core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java
+++ b/core/src/main/java/com/sk89q/worldedit/command/UtilityCommands.java
@@ -35,6 +35,7 @@ import com.boydti.fawe.util.StringMan;
 import com.boydti.fawe.util.chat.Message;
 import com.boydti.fawe.util.chat.UsageMessage;
 import com.boydti.fawe.util.gui.FormBuilder;
+import com.boydti.fawe.util.image.ImageUtil;
 import com.sk89q.minecraft.util.commands.*;
 import com.sk89q.worldedit.*;
 import com.sk89q.worldedit.Vector;
@@ -70,11 +71,18 @@ import com.sk89q.worldedit.util.command.binding.Text;
 import com.sk89q.worldedit.util.command.parametric.Optional;
 import com.sk89q.worldedit.util.command.parametric.ParameterData;
 import com.sk89q.worldedit.world.World;
+
+import javax.imageio.ImageIO;
+import java.awt.*;
+import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.FileFilter;
+import java.io.IOException;
 import java.lang.reflect.Type;
 import java.net.URI;
+import java.nio.file.Files;
 import java.util.*;
+import java.util.List;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.Consumer;
@@ -157,6 +165,70 @@ public class UtilityCommands extends MethodCommands {
         }
     }
 
+    @Command(
+            aliases = {"/heightmapinterface"},
+            desc = "Generate the heightmap interface: https://github.com/boy0001/HeightMap",
+            max = 0
+    )
+    public void heightmapInterface(FawePlayer player) throws IOException {
+        player.sendMessage("Please wait while we generate the minified heightmaps.");
+        File srcFolder = MainUtil.getFile(Fawe.imp().getDirectory(), Settings.IMP.PATHS.HEIGHTMAP);
+
+        int min = 100;
+        int max = 200;
+
+        File webSrc = new File(Fawe.imp().getDirectory(), "web" + File.separator + "heightmap");
+        File minImages = new File(webSrc, "images" + File.separator + "min");
+        File maxImages = new File(webSrc, "images" + File.separator + "max");
+        final int sub = srcFolder.getAbsolutePath().length();
+        List<String> images = new ArrayList<>();
+        MainUtil.iterateFiles(srcFolder, new Consumer<File>() {
+            @Override
+            public void accept(File file) {
+                switch (file.getName().substring(file.getName().lastIndexOf('.')).toLowerCase()) {
+                    case ".png":
+                    case ".jpeg":
+                        break;
+                    default:
+                        return;
+                }
+                try {
+                    String name = file.getAbsolutePath().substring(sub);
+                    if (name.startsWith(File.separator)) name = name.replaceFirst(java.util.regex.Pattern.quote(File.separator), "");
+                    BufferedImage img = MainUtil.readImage(file);
+                    BufferedImage minImg = ImageUtil.getScaledInstance(img, min, min, RenderingHints.VALUE_INTERPOLATION_BILINEAR, true);
+                    BufferedImage maxImg = ImageUtil.getScaledInstance(img, max, max, RenderingHints.VALUE_INTERPOLATION_BILINEAR, true);
+                    player.sendMessage("Writing " + name);
+                    File minFile = new File(minImages, name);
+                    File maxFile = new File(maxImages, name);
+                    minFile.getParentFile().mkdirs();
+                    maxFile.getParentFile().mkdirs();
+                    ImageIO.write(minImg, "png", minFile);
+                    ImageIO.write(maxImg, "png", maxFile);
+                    images.add(name);
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+        });
+        StringBuilder config = new StringBuilder();
+        config.append("var images = [\n");
+        for (String image : images) {
+            config.append('"' + image.replace(File.separator, "/") + "\",\n");
+        }
+        config.append("];\n");
+        config.append("// The low res images (they should all be the same size)\n");
+        config.append("var src_min = \"images/min/\";\n");
+        config.append("// The max resolution images (Use the same if there are no higher resolution ones available)\n");
+        config.append("var src_max = \"images/max/\";\n");
+        config.append("// The local source for the image (used in commands)\n");
+        config.append("var src_local = \"file://\";\n");
+        File configFile = new File(webSrc, "config.js");
+        player.sendMessage("Writing " + configFile);
+        Files.write(configFile.toPath(), config.toString().getBytes());
+        player.sendMessage("Done! See: `FastAsyncWorldEdit/web/heightmap`");
+    }
+
     @Command(
             aliases = {"/fill"},
             usage = "<pattern> <radius> [depth] [direction]",