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<h1 id="advanced-features-multiple-floors">Advanced Features: Multiple Floors</h1>
<p>Adding verticality to your dungeons can create more interesting exploration, distinct floor levels, and a better sense of scale or progression. DunGen supports multiple floors not through a specific feature, but by leveraging the core Tile and Doorway system.</p>
<hr />
<h2 id="how-it-works-vertical-doorway-placement">How it Works: Vertical Doorway Placement</h2>
<p>The key to achieving multi-floor layouts is simple: <strong>create Tile prefabs where Doorway components are placed at different Y-coordinates (heights).</strong></p>
<p>DunGen's generation process works by aligning the world-space <strong>position and orientation</strong> of doorways when connecting tiles. If two connected doorways have different Y-positions in their respective Tile prefabs, the newly placed Tile will naturally be positioned higher or lower than the previous one, creating a change in floor level.</p>
<p>A common example is a Tile representing a staircase:</p>
<figure>
<p><img alt="Doorway Height Variation" src="../assets/images/advanced-features/doorway-height-variance.png" /></p>
<figcaption>
<p>A <code>Tile</code> with multiple <code>Doorways</code> at different heights</p>
</figcaption>
</figure>
<p>When DunGen uses such a Tile, it seamlessly integrates vertical movement into the layout. If you simply include these "transition" Tiles in your regular <a href="../core-concepts/tile-sets.html">Tile Sets</a>, floor changes will occur organically based on random selection.</p>
<p>However, if you need more precise control over <em>when</em> and <em>how</em> floor transitions happen, you can use the following techniques.</p>
<hr />
<h2 id="controlling-floor-transitions">Controlling Floor Transitions</h2>
<p>Here are several ways to manage verticality in your dungeon generation:</p>
<h3 id="forcing-transition-direction-via-doorway-constraints">Forcing Transition Direction (via Doorway Constraints)</h3>
<p>You can dictate the direction of travel through a transition tile. If you want a specific staircase Tile to <em>only</em> ever lead upwards from the point of entry:</p>
<ol>
<li>Select the transition Tile prefab.</li>
<li>Inspect its <a href="../core-concepts/tiles.html">Tile Component</a>.</li>
<li>In the <code>Entrances</code> list, assign <strong>only the lower Doorway(s)</strong>.</li>
</ol>
<p>Now, DunGen can only enter this Tile via the bottom doorways, forcing the connection path to proceed upwards to exit through the higher doorways. Conversely, assigning only the <em>upper</em> doorways to <code>Entrances</code> forces downward transitions.</p>
<hr />
<h3 id="dedicated-transition-points-via-flow-nodes">Dedicated Transition Points (via Flow Nodes)</h3>
<p>To ensure a floor transition happens at a specific point in the dungeon's progression:</p>
<ol>
<li>Create a dedicated <a href="../core-concepts/tile-sets.html">Tile Set</a> containing <em>only</em> your floor transition Tiles (like staircases, ramps, elevators).</li>
<li>In the <a href="../core-concepts/flow-editor.html">Dungeon Flow Editor</a>, add a new Node along the main path where you want the transition to occur.</li>
<li>Assign your dedicated transition Tile Set to this specific Node. DunGen will be forced to pick a transition Tile at that exact point in the layout.</li>
</ol>
<hr />
<h3 id="generating-distinct-floors-sequentially">Generating Distinct Floors Sequentially</h3>
<p>To create completely separate floors generated one after another:</p>
<ol>
<li>Design your first floor's layout in the <a href="../core-concepts/flow-editor.html">Dungeon Flow Editor</a>.</li>
<li>Assign a Tile Set containing <em>only</em> upward transition Tiles (e.g., stairs leading up) to the <strong><code>Goal</code> Node</strong> of this first floor's flow graph.</li>
<li>Generate the first floor dungeon. It will end with a transition Tile leading to an unused Doorway at the upper level.</li>
<li>Use the <a href="attached-dungeons.html">Generating Attached Dungeons</a> feature to generate a <em>second</em> dungeon instance, instructing it to attach specifically to that unused upper Doorway. This second dungeon instance will represent the next floor. Repeat as needed for more floors.</li>
</ol>
<hr />
<p>Effective use of multiple floors adds depth and complexity to your generated levels. By designing appropriate transition Tiles and using DunGen's flow control features, you can create compelling multi-level environments.</p>


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