diff --git a/src/main/java/com/dfsek/noise/swing/NoisePanel.java b/src/main/java/com/dfsek/noise/swing/NoisePanel.java
index 0bd2913..59cbd90 100644
--- a/src/main/java/com/dfsek/noise/swing/NoisePanel.java
+++ b/src/main/java/com/dfsek/noise/swing/NoisePanel.java
@@ -208,11 +208,14 @@ private boolean[][][] getNoiseVals3d(long seed) {
         double originZ = this.settingsPanel.getOriginZ();
 
         int sampleRes = this.settingsPanel.getVoxelResolution();
-        boolean[][][] noiseVals = new boolean[sampleRes][sampleRes][sampleRes];
+        int sampleYMin = this.settingsPanel.getVoxelBottomY();
+        int sampleYMax = this.settingsPanel.getVoxelTopY();
+
+        boolean[][][] noiseVals = new boolean[sampleRes][sampleYMax - sampleYMin][sampleRes];
         for (int x = 0; x < noiseVals.length; x++) {
             for (int y = 0; y < noiseVals[x].length; y++) {
                 for(int z = 0; z < (noiseVals[x][y]).length; z++) {
-                    double n = noiseSeeded.noise(seed, x + originX, y, z + originZ);
+                    double n = noiseSeeded.noise(seed, x + originX, y + sampleYMin, z + originZ);
                     noiseVals[x][y][z] = n > 0;
                 }
             }
diff --git a/src/main/java/com/dfsek/noise/swing/NoiseSettingsPanel.java b/src/main/java/com/dfsek/noise/swing/NoiseSettingsPanel.java
index 41eb7b6..630eaef 100644
--- a/src/main/java/com/dfsek/noise/swing/NoiseSettingsPanel.java
+++ b/src/main/java/com/dfsek/noise/swing/NoiseSettingsPanel.java
@@ -17,6 +17,8 @@ public class NoiseSettingsPanel extends JPanel {
 
     // Voxel preview settings
     private final JSpinner voxelResolution = new JSpinner(new SpinnerNumberModel(128, 0, Integer.MAX_VALUE, 1));
+    private final JSpinner voxelBottomY = new JSpinner(new SpinnerNumberModel(-64, Integer.MIN_VALUE, Integer.MAX_VALUE, 1));
+    private final JSpinner voxelTopY = new JSpinner(new SpinnerNumberModel(319, Integer.MIN_VALUE, Integer.MAX_VALUE, 1));
 
     // Color scale presets
     private final ColorScale customColorScalePreset = new ColorScale("Custom", false, (float[][]) null);
@@ -48,6 +50,11 @@ public NoiseSettingsPanel() {
         add(new JLabel("Voxel preview resolution: "));
         add(voxelResolution);
 
+        add(new JLabel("Voxel preview bottom Y: "));
+        add(voxelBottomY);
+        add(new JLabel("Voxel preview top Y: "));
+        add(voxelTopY);
+
         add(new JLabel("Color scale preset: "));
         colorScalePresets.setSelectedItem(ColorScale.GRAYSCALE_NORMALIZED);
         add(colorScalePresets);
@@ -104,7 +111,7 @@ public void actionPerformed(ActionEvent e) {
             }
         });
 
-        SwingUtils.makeCompactGrid(this, 7, 2, 10, 10, 10, 10);
+        SwingUtils.makeCompactGrid(this, 9, 2, 10, 10, 10, 10);
     }
 
     public int getSeed() {
@@ -131,6 +138,14 @@ public int getVoxelResolution() {
         return ((Number) voxelResolution.getValue()).intValue();
     }
 
+    public int getVoxelBottomY() {
+        return ((Number) voxelBottomY.getValue()).intValue();
+    }
+
+    public int getVoxelTopY() {
+        return ((Number) voxelTopY.getValue()).intValue();
+    }
+
     public ColorScale getColorScale() {
         ColorScale selection = (ColorScale) colorScalePresets.getSelectedItem();
         if (selection == customColorScalePreset) {