diff --git a/apps/editor/components/editor.tsx b/apps/editor/components/editor.tsx
index 09f769de..0248cbd4 100644
--- a/apps/editor/components/editor.tsx
+++ b/apps/editor/components/editor.tsx
@@ -5,11 +5,12 @@ import {
   initSpatialGridSync,
   ItemNode,
   sceneRegistry,
+  useRegistry,
   useScene,
   WallNode,
 } from "@pascal-app/core";
 import { useGridEvents, useViewer, Viewer } from "@pascal-app/viewer";
-import { Stats } from "@react-three/drei";
+import { CameraControls, CameraControlsImpl, Stats } from "@react-three/drei";
 import { useFrame, useThree } from "@react-three/fiber";
 import { useEffect, useMemo, useRef } from "react";
 import { Color, Object3D } from "three";
@@ -54,10 +55,37 @@ export default function Editor() {
         <Grid cellColor="#666" sectionColor="#999" fadeDistance={30} />
         <Passes />
         <ToolManager />
+        <EditorCameraManager />
       </Viewer>
     </div>
   );
 }
+const EditorCameraManager = () => {
+  const controls = useRef<CameraControlsImpl>(null!);
+  const currentLevelId = useViewer((state) => state.currentLevelId);
+
+  useEffect(() => {
+    let targetY = 0;
+    if (currentLevelId) {
+      const levelMesh = sceneRegistry.nodes.get(currentLevelId);
+      if (levelMesh) {
+        targetY = levelMesh.position.y;
+      }
+    }
+    const { position } = controls.current.camera;
+    controls.current.setLookAt(
+      position.x,
+      targetY + 5,
+      position.z,
+      0,
+      targetY,
+      0,
+      true,
+    );
+  }, [currentLevelId]);
+
+  return <CameraControls ref={controls} />;
+};
 
 const TestUndo = () => {
   const { undo, redo, futureStates, pastStates } = useScene.temporal.getState();
diff --git a/apps/editor/components/ui/primitives/sidebar.tsx b/apps/editor/components/ui/primitives/sidebar.tsx
index 3c2d3cbb..f4b4d8f4 100644
--- a/apps/editor/components/ui/primitives/sidebar.tsx
+++ b/apps/editor/components/ui/primitives/sidebar.tsx
@@ -132,7 +132,7 @@ function SidebarProvider({
       <TooltipProvider delayDuration={0}>
         <div
           className={cn(
-            "group/sidebar-wrapper flex min-h-svh w-full has-data-[variant=inset]:bg-sidebar",
+            "group/sidebar-wrapper flex min-h-svh w-full has-data-[variant=inset]:bg-sidebar pointer-events-none",
             className,
           )}
           data-slot="sidebar-wrapper"
@@ -229,7 +229,7 @@ function Sidebar({
       />
       <div
         className={cn(
-          "fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear md:flex",
+          "fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear md:flex pointer-events-auto",
           side === "left"
             ? "left-0 group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)]"
             : "right-0 group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)]",
@@ -243,7 +243,7 @@ function Sidebar({
         {...props}
       >
         <div
-          className="flex h-full w-full flex-col bg-sidebar group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:border group-data-[variant=floating]:border-sidebar-border group-data-[variant=floating]:shadow-sm"
+          className="flex h-full w-full flex-col bg-sidebar group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:border group-data-[variant=floating]:border-sidebar-border group-data-[variant=floating]:shadow-sm pointer-events-auto"
           data-sidebar="sidebar"
           data-slot="sidebar-inner"
         >
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel.tsx b/apps/editor/components/ui/sidebar/panels/site-panel.tsx
deleted file mode 100644
index c9f86518..00000000
--- a/apps/editor/components/ui/sidebar/panels/site-panel.tsx
+++ /dev/null
@@ -1,12 +0,0 @@
-import { useScene } from "@pascal-app/core";
-
-export function SitePanel() {
-  const rootNodes = useScene((state) => state.rootNodeIds);
-  return (
-    <div>
-      {rootNodes.map((nodeId) => (
-        <div key={nodeId}>{nodeId}</div>
-      ))}
-    </div>
-  );
-}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/building-tree-node.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/building-tree-node.tsx
new file mode 100644
index 00000000..51d0c65e
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/building-tree-node.tsx
@@ -0,0 +1,62 @@
+import { BuildingNode, LevelNode, useScene } from "@pascal-app/core";
+import { Building2, Plus } from "lucide-react";
+import { useState } from "react";
+import { TreeNode, TreeNodeWrapper } from "./tree-node";
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from "@/components/ui/primitives/tooltip";
+
+interface BuildingTreeNodeProps {
+  node: BuildingNode;
+  depth: number;
+}
+
+export function BuildingTreeNode({ node, depth }: BuildingTreeNodeProps) {
+  const [expanded, setExpanded] = useState(true);
+  const createNode = useScene((state) => state.createNode);
+
+  const handleClick = () => {
+    // Handle building selection
+  };
+
+  const handleAddLevel = (e: React.MouseEvent) => {
+    e.stopPropagation();
+    const newLevel = LevelNode.parse({
+      level: node.children.length,
+      children: [],
+      parentId: node.id,
+    });
+    createNode(newLevel, node.id);
+  };
+
+  return (
+    <TreeNodeWrapper
+      icon={<Building2 className="w-3.5 h-3.5" />}
+      label={node.name || "Building"}
+      depth={depth}
+      hasChildren={node.children.length > 0}
+      expanded={expanded}
+      onToggle={() => setExpanded(!expanded)}
+      onClick={handleClick}
+      actions={
+        <Tooltip>
+          <TooltipTrigger asChild>
+            <button
+              className="w-5 h-5 flex items-center justify-center rounded hover:bg-accent"
+              onClick={handleAddLevel}
+            >
+              <Plus className="w-3 h-3" />
+            </button>
+          </TooltipTrigger>
+          <TooltipContent side="right">Add new level</TooltipContent>
+        </Tooltip>
+      }
+    >
+      {node.children.map((childId) => (
+        <TreeNode key={childId} nodeId={childId} depth={depth + 1} />
+      ))}
+    </TreeNodeWrapper>
+  );
+}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/index.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/index.tsx
new file mode 100644
index 00000000..52f5ac3e
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/index.tsx
@@ -0,0 +1,14 @@
+import { useScene } from "@pascal-app/core";
+import { TreeNode } from "./tree-node";
+
+export function SitePanel() {
+  const rootNodeIds = useScene((state) => state.rootNodeIds);
+
+  return (
+    <div className="py-1">
+      {rootNodeIds.map((nodeId) => (
+        <TreeNode key={nodeId} nodeId={nodeId} />
+      ))}
+    </div>
+  );
+}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/item-tree-node.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/item-tree-node.tsx
new file mode 100644
index 00000000..acc8877d
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/item-tree-node.tsx
@@ -0,0 +1,26 @@
+import { ItemNode } from "@pascal-app/core";
+import { Box } from "lucide-react";
+import { TreeNodeWrapper } from "./tree-node";
+
+interface ItemTreeNodeProps {
+  node: ItemNode;
+  depth: number;
+}
+
+export function ItemTreeNode({ node, depth }: ItemTreeNodeProps) {
+  const handleClick = () => {
+    // Handle item selection
+  };
+
+  return (
+    <TreeNodeWrapper
+      icon={<Box className="w-3.5 h-3.5" />}
+      label={node.name || node.asset.name || "Item"}
+      depth={depth}
+      hasChildren={false}
+      expanded={false}
+      onToggle={() => {}}
+      onClick={handleClick}
+    />
+  );
+}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/level-tree-node.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/level-tree-node.tsx
new file mode 100644
index 00000000..8666e42a
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/level-tree-node.tsx
@@ -0,0 +1,39 @@
+import { LevelNode } from "@pascal-app/core";
+import { useViewer } from "@pascal-app/viewer";
+import { Layers } from "lucide-react";
+import { useState } from "react";
+import { TreeNode, TreeNodeWrapper } from "./tree-node";
+
+interface LevelTreeNodeProps {
+  node: LevelNode;
+  depth: number;
+}
+
+export function LevelTreeNode({ node, depth }: LevelTreeNodeProps) {
+  const [expanded, setExpanded] = useState(true);
+  const currentLevelId = useViewer((state) => state.currentLevelId);
+  const setCurrentLevel = useViewer((state) => state.setCurrentLevelId);
+
+  const handleClick = () => {
+    setCurrentLevel(node.id);
+  };
+
+  const isSelected = currentLevelId === node.id;
+
+  return (
+    <TreeNodeWrapper
+      icon={<Layers className="w-3.5 h-3.5" />}
+      label={node.name || `Level ${node.level}`}
+      depth={depth}
+      hasChildren={node.children.length > 0}
+      expanded={expanded}
+      onToggle={() => setExpanded(!expanded)}
+      onClick={handleClick}
+      isSelected={isSelected}
+    >
+      {node.children.map((childId) => (
+        <TreeNode key={childId} nodeId={childId} depth={depth + 1} />
+      ))}
+    </TreeNodeWrapper>
+  );
+}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/tree-node.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/tree-node.tsx
new file mode 100644
index 00000000..fe12921b
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/tree-node.tsx
@@ -0,0 +1,101 @@
+import { AnyNodeId, useScene } from "@pascal-app/core";
+import { ChevronDown, ChevronRight } from "lucide-react";
+import { cn } from "@/lib/utils";
+import { BuildingTreeNode } from "./building-tree-node";
+import { LevelTreeNode } from "./level-tree-node";
+import { WallTreeNode } from "./wall-tree-node";
+import { ItemTreeNode } from "./item-tree-node";
+
+interface TreeNodeProps {
+  nodeId: AnyNodeId;
+  depth?: number;
+}
+
+export function TreeNode({ nodeId, depth = 0 }: TreeNodeProps) {
+  const node = useScene((state) => state.nodes[nodeId]);
+
+  if (!node) return null;
+
+  switch (node.type) {
+    case "building":
+      return <BuildingTreeNode node={node} depth={depth} />;
+    case "level":
+      return <LevelTreeNode node={node} depth={depth} />;
+    case "wall":
+      return <WallTreeNode node={node} depth={depth} />;
+    case "item":
+      return <ItemTreeNode node={node} depth={depth} />;
+    default:
+      return null;
+  }
+}
+
+interface TreeNodeWrapperProps {
+  icon: React.ReactNode;
+  label: string;
+  depth: number;
+  hasChildren: boolean;
+  expanded: boolean;
+  onToggle: () => void;
+  onClick: () => void;
+  actions?: React.ReactNode;
+  children?: React.ReactNode;
+  isSelected?: boolean;
+}
+
+export function TreeNodeWrapper({
+  icon,
+  label,
+  depth,
+  hasChildren,
+  expanded,
+  onToggle,
+  onClick,
+  actions,
+  children,
+  isSelected,
+}: TreeNodeWrapperProps) {
+  return (
+    <div>
+      <div
+        className={cn(
+          "flex items-center h-7 hover:bg-accent/50 cursor-pointer group",
+          "text-sm",
+          isSelected ? "text-primary-foreground bg-primary/80" : "text-muted-foreground"
+        )}
+        style={{ paddingLeft: depth * 12 + 4 }}
+      >
+        <button
+          className="w-4 h-4 flex items-center justify-center shrink-0"
+          onClick={(e) => {
+            e.stopPropagation();
+            onToggle();
+          }}
+        >
+          {hasChildren ? (
+            expanded ? (
+              <ChevronDown className="w-3 h-3" />
+            ) : (
+              <ChevronRight className="w-3 h-3" />
+            )
+          ) : null}
+        </button>
+        <div
+          className="flex items-center gap-1.5 flex-1 min-w-0"
+          onClick={onClick}
+        >
+          <span className="w-4 h-4 flex items-center justify-center shrink-0">
+            {icon}
+          </span>
+          <span className="truncate">{label}</span>
+        </div>
+        {actions && (
+          <div className="opacity-0 group-hover:opacity-100 pr-1">
+            {actions}
+          </div>
+        )}
+      </div>
+      {expanded && children}
+    </div>
+  );
+}
diff --git a/apps/editor/components/ui/sidebar/panels/site-panel/wall-tree-node.tsx b/apps/editor/components/ui/sidebar/panels/site-panel/wall-tree-node.tsx
new file mode 100644
index 00000000..3421dc4e
--- /dev/null
+++ b/apps/editor/components/ui/sidebar/panels/site-panel/wall-tree-node.tsx
@@ -0,0 +1,39 @@
+import { WallNode, useScene } from "@pascal-app/core";
+import { Square } from "lucide-react";
+import { useState } from "react";
+import { TreeNode, TreeNodeWrapper } from "./tree-node";
+
+interface WallTreeNodeProps {
+  node: WallNode;
+  depth: number;
+}
+
+export function WallTreeNode({ node, depth }: WallTreeNodeProps) {
+  const [expanded, setExpanded] = useState(false);
+
+  const handleClick = () => {
+    // Handle wall selection
+    useScene.getState().markDirty(node.id);
+  };
+
+  const wallLength = Math.sqrt(
+    Math.pow(node.end[0] - node.start[0], 2) +
+      Math.pow(node.end[1] - node.start[1], 2)
+  ).toFixed(1);
+
+  return (
+    <TreeNodeWrapper
+      icon={<Square className="w-3.5 h-3.5" />}
+      label={node.name || `Wall (${wallLength}m)`}
+      depth={depth}
+      hasChildren={node.children.length > 0}
+      expanded={expanded}
+      onToggle={() => setExpanded(!expanded)}
+      onClick={handleClick}
+    >
+      {node.children.map((childId) => (
+        <TreeNode key={childId} nodeId={childId} depth={depth + 1} />
+      ))}
+    </TreeNodeWrapper>
+  );
+}
diff --git a/packages/viewer/src/components/viewer/viewer.tsx b/packages/viewer/src/components/viewer/viewer.tsx
index 1b0f73aa..305827ba 100644
--- a/packages/viewer/src/components/viewer/viewer.tsx
+++ b/packages/viewer/src/components/viewer/viewer.tsx
@@ -32,7 +32,7 @@ const Viewer: React.FC<ViewerProps> = ({ children }) => {
       camera={{ position: [3, 3, 3], fov: 50 }}
     >
       <color attach="background" args={["#ececec"]} />
-      <OrbitControls />
+
       <Environment preset="sunset" />
       <Bvh>
         <SceneRenderer />