diff --git a/src/main/java/me/zeroeightsix/kami/command/commands/XRayCommand.java b/src/main/java/me/zeroeightsix/kami/command/commands/XRayCommand.java
new file mode 100644
index 00000000..2b1dabb9
--- /dev/null
+++ b/src/main/java/me/zeroeightsix/kami/command/commands/XRayCommand.java
@@ -0,0 +1,65 @@
+package me.zeroeightsix.kami.command.commands;
+
+import me.zeroeightsix.kami.command.Command;
+import me.zeroeightsix.kami.command.syntax.ChunkBuilder;
+import me.zeroeightsix.kami.module.ModuleManager;
+import me.zeroeightsix.kami.module.modules.render.XRay;
+import net.minecraft.block.Block;
+
+/**
+ * Created by 20kdc on 17/02/2020.
+ */
+public class XRayCommand extends Command {
+    public XRayCommand() {
+        super("xray", new ChunkBuilder().append("subcommand").build());
+        setDescription("Has a set of sub-commands to control the XRay module.");
+    }
+
+    @Override
+    public void call(String[] args) {
+        XRay xr = (XRay) ModuleManager.getModuleByName("XRay");
+        if (xr == null) {
+            Command.sendChatMessage("&cThe XRay module is not available for some reason.");
+            return;
+        }
+        if (!xr.isEnabled()) {
+            Command.sendChatMessage("&cWarning: The XRay module is not enabled.");
+            Command.sendChatMessage("&cThese commands will still have effects, but will not visibly do anything.");
+        }
+        for (String s : args) {
+            if (s == null)
+                continue;
+            if (s.equalsIgnoreCase("help")) {
+                Command.sendChatMessage("The XRay module has a list of blocks.");
+                Command.sendChatMessage("Normally, the XRay module hides these blocks.");
+                Command.sendChatMessage("When the Invert setting is on, the XRay only shows these blocks.");
+                Command.sendChatMessage("This command is a convenient way to quickly edit the list.");
+                Command.sendChatMessage("XRay Subcommands:");
+                Command.sendChatMessage(".xray help : Shows this text.");
+                Command.sendChatMessage(".xray clear : Removes all blocks from the XRay block list.");
+                Command.sendChatMessage(".xray show : Shows the list.");
+                Command.sendChatMessage(".xray +<block> : Adds a block to the list.");
+                Command.sendChatMessage(".xray -<block> : Removes a block from the list.");
+            } else if (s.equalsIgnoreCase("clear")) {
+                xr.extClear();
+                Command.sendChatMessage("Cleared the XRay block list.");
+            } else if (s.equalsIgnoreCase("show")) {
+                Command.sendChatMessage(xr.extGet());
+            } else if (s.startsWith("+") || s.startsWith("-")) {
+                String name = s.substring(1);
+                Block b = Block.getBlockFromName(name);
+                if (b == null) {
+                    Command.sendChatMessage("&cInvalid block name " + name + ".");
+                } else {
+                    if (s.startsWith("+")) {
+                        xr.extAdd(name);
+                    } else {
+                        xr.extRemove(name);
+                    }
+                }
+            } else {
+                Command.sendChatMessage("&cInvalid subcommand " + s + ".");
+            }
+        }
+    }
+}
diff --git a/src/main/java/me/zeroeightsix/kami/module/modules/render/XRay.java b/src/main/java/me/zeroeightsix/kami/module/modules/render/XRay.java
index e46224c1..0355a642 100644
--- a/src/main/java/me/zeroeightsix/kami/module/modules/render/XRay.java
+++ b/src/main/java/me/zeroeightsix/kami/module/modules/render/XRay.java
@@ -34,21 +34,38 @@ import me.zeroeightsix.kami.KamiMod;
 public class XRay extends Module {
 
     // A default reasonable configuration for the XRay. Most people will want to use it like this.
-    public static final String DEFAULT_XRAY_CONFIG = "minecraft:grass,minecraft:dirt,minecraft:netherrack,minecraft:gravel,minecraft:sand,minecraft:stone";
+    private static final String DEFAULT_XRAY_CONFIG = "minecraft:grass,minecraft:dirt,minecraft:netherrack,minecraft:gravel,minecraft:sand,minecraft:stone";
     // Split by ',' & each element trimmed (this is a bit weird but it works for now?)
     private Setting<String> hiddenBlockNames = register(Settings.stringBuilder("HiddenBlocks").withValue(DEFAULT_XRAY_CONFIG).withConsumer((old, value) -> {
         refreshHiddenBlocksSet(value);
         if (isEnabled())
             mc.renderGlobal.loadRenderers();
     }));
+    private Setting<Boolean> invert = register(Settings.booleanBuilder("Invert").withValue(false).withConsumer((old, value) -> {
+        invertStatic = value;
+        if (isEnabled())
+            mc.renderGlobal.loadRenderers();
+    }));
+    private Setting<Boolean> outlines = register(Settings.booleanBuilder("Outlines").withValue(true).withConsumer((old, value) -> {
+        outlinesStatic = value;
+        if (isEnabled())
+            mc.renderGlobal.loadRenderers();
+    }));
 
+    // A static mirror of the state.
     private static Set<Block> hiddenBlocks = Collections.synchronizedSet(new HashSet<>());
+    private static boolean invertStatic, outlinesStatic = true;
 
     // This is the state used for hidden blocks.
     private static IBlockState transparentState;
+    // This is used as part of a mechanism to make the Minecraft renderer play along with the XRay.
+    // Essentially, the XRay primitive is just a block state transformer.
+    // Then this implements a custom block that the block state transformer can use for hidden blocks.
     public static Block transparentBlock;
 
     public XRay() {
+        invertStatic = invert.getValue();
+        outlinesStatic = outlines.getValue();
         refreshHiddenBlocksSet(hiddenBlockNames.getValue());
     }
 
@@ -62,7 +79,11 @@ public class XRay extends Module {
     }
     // Remove entry by arbitrary user-provided string
     public void extRemove(String s) {
-        hiddenBlockNames.setValue(extGetInternal(Block.getBlockFromName(s)) + ", " + s);
+        hiddenBlockNames.setValue(extGetInternal(Block.getBlockFromName(s)));
+    }
+    // Clears the list.
+    public void extClear() {
+        hiddenBlockNames.setValue("");
     }
 
     private String extGetInternal(Block filter) {
@@ -126,8 +147,16 @@ public class XRay extends Module {
     }
 
     public static IBlockState transform(IBlockState input) {
-        if (hiddenBlocks.contains(input.getBlock()))
-            return transparentState != null ? transparentState : Blocks.AIR.getDefaultState();
+        Block b = input.getBlock();
+        boolean hide = hiddenBlocks.contains(b);
+        if (invertStatic)
+            hide = !hide;
+        if (hide) {
+            IBlockState target = Blocks.AIR.getDefaultState();
+            if (outlinesStatic && (transparentState != null))
+                target = transparentState;
+            return target;
+        }
         return input;
     }