diff --git a/index.html b/index.html
index d6376680..54c23d9f 100644
--- a/index.html
+++ b/index.html
@@ -21,13 +21,13 @@
   </nav>
   <div class="container">
     <div class="row my-4">
-      <div class="col-12 col-md-7">
+      <div class="col-12 col-md-7 mb-3">
         <div class="input-group">
           <button type="button" class="btn btn-success d-block mr-3 float-left" onclick="addPool(this)">Add Pool</button>
           <div class="input-group-prepend">
             <span class="input-group-text rounded-left">Type</span>
           </div>
-          <select id="tableType" class="form-control" style="max-width: 9em;" onchange="updateTableType(this)">
+          <select id="tableType" class="form-control mr-3 rounded-right" style="max-width: 9em;" onchange="updateTableType(this)">
             <option value="minecraft:empty">Empty</option>
             <option value="minecraft:entity">Entity</option>
             <option value="minecraft:block">Block</option>
@@ -35,6 +35,12 @@
             <option value="minecraft:fishing">Fishing</option>
             <option value="minecraft:generic">Generic</option>
           </select>
+          <div class="input-group-prepend">
+            <div class="input-group-text rounded-left">
+              <input id="luckBased" type="checkbox" onchange="updateLuckBased(this)">
+            </div>
+          </div>
+          <label class="form-control overflow-hidden" for="luckBased" style="max-width: 7em;">Luck based</label>
         </div>
         <div id="structure"">
         </div>
@@ -142,6 +148,12 @@
           </div>
           <input type="text" class="form-control" onchange="updateEntryWeight(this)">
         </div>
+        <div class="input-group mt-3 entry-quality d-none">
+          <div class="input-group-prepend">
+            <span class="input-group-text">Quality</span>
+          </div>
+          <input type="text" class="form-control" onchange="updateEntryQuality(this)">
+        </div>
         <div class="input-group mt-3 entry-children d-none">
           <button type="button" class="btn btn-outline-success">Add Child</button>
         </div>
diff --git a/script.js b/script.js
index dd93a864..ee4d4fec 100644
--- a/script.js
+++ b/script.js
@@ -3,6 +3,7 @@ $("#source").val('');
 $('#tableType').val("minecraft:generic");
 $('#indentationSelect').val("2");
 let indentation = 2;
+let luck_based = false;
 let table = {
   type: "minecraft:generic",
   pools: []
@@ -134,11 +135,26 @@ function updateEntryWeight(el) {
   invalidated();
 }
 
+function updateEntryQuality(el) {
+  let quality = parseInt($(el).val());
+  if (isNaN(quality)) {
+    delete getEntry(el).quality;
+  } else {
+    getEntry(el).quality = quality;
+  }
+  invalidated();
+}
+
 function updateTableType() {
   table.type = $('#tableType').val();
   invalidated();
 }
 
+function updateLuckBased() {
+  luck_based = $('#luckBased').prop('checked');
+  invalidated();
+}
+
 function updateSouce() {
   $('#source').removeClass('invalid');
   try {
@@ -203,6 +219,7 @@ function generateStructure() {
     // Bonus Rolls
     let $bonus_rolls = $pool.find('.bonus-rolls');
     if (pool.bonus_rolls) {
+      luck_based = true;
       if (typeof pool.bonus_rolls === 'object') {
         if (pool.bonus_rolls.type && pool.bonus_rolls.type.match(/(minecraft:)?binomial/)) {
           $bonus_rolls.attr('data-type', 'binomial');
@@ -223,6 +240,9 @@ function generateStructure() {
     } else {
       $bonus_rolls.find('.exact').removeClass('d-none');
     }
+    if (!luck_based) {
+      $pool.find('.bonus-rolls').addClass('d-none');
+    }
 
     // Entries
     for (let j = 0; j < pool.entries.length; j += 1) {
@@ -239,9 +259,18 @@ function generateStructure() {
         $entry.find('.entry-name input').val(entry.name);
       }
       $entry.find('.entry-weight').removeClass('d-none');
+      if (luck_based) {
+        $entry.find('.entry-quality').removeClass('d-none');
+      } else {
+        $entry.find('.entry-quality').addClass('d-none');
+      }
       if (entry.weight) {
         $entry.find('.entry-weight input').val(entry.weight);
       }
+      if (entry.quality) {
+        luck_based = true;
+        $entry.find('.entry-quality input').val(entry.quality);
+      }
       if (entry.type === 'minecraft:alternatives' || entry.type === 'minecraft:sequence' || entry.type === 'minecraft:group') {
         delete entry.name;
         $entry.find('.entry-children').removeClass('d-none');
@@ -250,5 +279,7 @@ function generateStructure() {
       $pool.children('.card-body').append($entry);
     }
     $('#structure').append($pool);
+
+    $('#luck-based').attr('checked', luck_based);
   }
 }