diff --git a/apps/editor/components/editor/index.tsx b/apps/editor/components/editor/index.tsx
index e0280f34..e27abda6 100644
--- a/apps/editor/components/editor/index.tsx
+++ b/apps/editor/components/editor/index.tsx
@@ -11,6 +11,7 @@ import { ActionMenu } from '../ui/action-menu'
 import { CloudSaveButton } from '@/features/community/components/cloud-save-button'
 import { PascalRadio } from '../pascal-radio'
 import { PanelManager } from '../ui/panels/panel-manager'
+import { HelperManager } from '../ui/helpers/helper-manager'
 import { SidebarProvider } from '../ui/primitives/sidebar'
 import { AppSidebar } from '../ui/sidebar/app-sidebar'
 import { CustomCameraControls } from './custom-camera-controls'
@@ -34,6 +35,7 @@ export default function Editor() {
     <div className="w-full h-full">
       <ActionMenu />
       <PanelManager />
+      <HelperManager />
 
       {/* Top-right controls */}
       <div className="pointer-events-none fixed top-4 right-4 z-50 flex items-start gap-2">
diff --git a/apps/editor/components/tools/item/use-placement-coordinator.tsx b/apps/editor/components/tools/item/use-placement-coordinator.tsx
index 457b4fdf..056e465b 100644
--- a/apps/editor/components/tools/item/use-placement-coordinator.tsx
+++ b/apps/editor/components/tools/item/use-placement-coordinator.tsx
@@ -17,12 +17,17 @@ import { useFrame } from '@react-three/fiber'
 import { useEffect, useRef } from 'react'
 import {
   BoxGeometry,
+  EdgesGeometry,
   Euler,
+  type Group,
+  type LineSegments,
   type Mesh,
-  type MeshStandardMaterial,
+  PlaneGeometry,
   Quaternion,
   Vector3,
 } from 'three'
+import { distance, smoothstep, uv, vec2 } from 'three/tsl'
+import { LineBasicNodeMaterial, MeshBasicNodeMaterial } from 'three/webgpu'
 import { sfxEmitter } from '@/lib/sfx-bus'
 import { ceilingStrategy, checkCanPlace, floorStrategy, wallStrategy } from './placement-strategies'
 import type { PlacementState, TransitionResult } from './placement-types'
@@ -30,6 +35,28 @@ import type { DraftNodeHandle } from './use-draft-node'
 
 const DEFAULT_DIMENSIONS: [number, number, number] = [1, 1, 1]
 
+// Shared materials for placement cursor - we just change colors, not swap materials
+// Note: EdgesGeometry doesn't work with dashed lines, so using solid lines
+const edgeMaterial = new LineBasicNodeMaterial({
+  color: 0xef4444, // red-500 (invalid)
+  linewidth: 3,
+  depthTest: false,
+  depthWrite: false,
+})
+
+const basePlaneMaterial = new MeshBasicNodeMaterial({
+  color: 0xef4444, // red-500 (invalid)
+  transparent: true,
+  depthTest: false,
+  depthWrite: false,
+})
+
+// Create radial opacity: transparent in center, opaque at edges
+const center = vec2(0.5, 0.5)
+const dist = distance(uv(), center)
+const radialOpacity = smoothstep(0, 0.7, dist).mul(0.6)
+basePlaneMaterial.opacityNode = radialOpacity
+
 export interface PlacementCoordinatorConfig {
   asset: AssetInput
   draftNode: DraftNodeHandle
@@ -40,7 +67,9 @@ export interface PlacementCoordinatorConfig {
 }
 
 export function usePlacementCoordinator(config: PlacementCoordinatorConfig): React.ReactNode {
-  const cursorRef = useRef<Mesh>(null!)
+  const cursorGroupRef = useRef<Group>(null!)
+  const edgesRef = useRef<LineSegments>(null!)
+  const basePlaneRef = useRef<Mesh>(null!)
   const gridPosition = useRef(new Vector3(0, 0, 0))
   const placementState = useRef<PlacementState>(
     config.initialState ?? { surface: 'floor', wallId: null, ceilingId: null },
@@ -77,7 +106,9 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
 
     const revalidate = (): boolean => {
       const placeable = checkCanPlace(getContext(), validators)
-      ;(cursorRef.current.material as MeshStandardMaterial).color.set(placeable ? 'green' : 'red')
+      const color = placeable ? 0x22c55e : 0xef4444 // green-500 : red-500
+      edgeMaterial.color.setHex(color)
+      basePlaneMaterial.color.setHex(color)
       return placeable
     }
 
@@ -85,8 +116,8 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
       Object.assign(placementState.current, result.stateUpdate)
       gridPosition.current.set(...result.gridPosition)
 
-      cursorRef.current.position.set(...result.cursorPosition)
-      cursorRef.current.rotation.y = result.cursorRotationY
+      cursorGroupRef.current.position.set(...result.cursorPosition)
+      cursorGroupRef.current.rotation.y = result.cursorRotationY
 
       const draft = draftNode.current
       if (draft) {
@@ -98,8 +129,8 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
 
     const ensureDraft = (result: TransitionResult) => {
       gridPosition.current.set(...result.gridPosition)
-      cursorRef.current.position.set(...result.cursorPosition)
-      cursorRef.current.rotation.y = result.cursorRotationY
+      cursorGroupRef.current.position.set(...result.cursorPosition)
+      cursorGroupRef.current.rotation.y = result.cursorRotationY
 
       draftNode.create(gridPosition.current, asset, [0, result.cursorRotationY, 0])
 
@@ -122,14 +153,14 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
     if (draftNode.current) {
       const mesh = sceneRegistry.nodes.get(draftNode.current.id)
       if (mesh) {
-        mesh.getWorldPosition(cursorRef.current.position)
+        mesh.getWorldPosition(cursorGroupRef.current.position)
         // Extract world Y rotation (handles wall-parented items correctly)
         const q = new Quaternion()
         mesh.getWorldQuaternion(q)
-        cursorRef.current.rotation.y = new Euler().setFromQuaternion(q, 'YXZ').y
+        cursorGroupRef.current.rotation.y = new Euler().setFromQuaternion(q, 'YXZ').y
       } else {
-        cursorRef.current.position.copy(gridPosition.current)
-        cursorRef.current.rotation.y = draftNode.current.rotation[1] ?? 0
+        cursorGroupRef.current.position.copy(gridPosition.current)
+        cursorGroupRef.current.rotation.y = draftNode.current.rotation[1] ?? 0
       }
     }
 
@@ -144,17 +175,19 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
       if (!result) return
 
       // Play snap sound when grid position changes
-      if (previousGridPos &&
-          (result.gridPosition[0] !== previousGridPos[0] ||
-           result.gridPosition[2] !== previousGridPos[2])) {
+      if (
+        previousGridPos &&
+        (result.gridPosition[0] !== previousGridPos[0] ||
+          result.gridPosition[2] !== previousGridPos[2])
+      ) {
         sfxEmitter.emit('sfx:grid-snap')
       }
 
       previousGridPos = [...result.gridPosition]
       gridPosition.current.set(...result.gridPosition)
       // Only update X and Z for cursor - useFrame will handle Y (slab elevation)
-      cursorRef.current.position.x = result.cursorPosition[0]
-      cursorRef.current.position.z = result.cursorPosition[2]
+      cursorGroupRef.current.position.x = result.cursorPosition[0]
+      cursorGroupRef.current.position.z = result.cursorPosition[2]
 
       const draft = draftNode.current
       if (draft) draft.position = result.gridPosition
@@ -167,7 +200,7 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
       if (!result) return
 
       // Preserve cursor rotation for the next draft
-      const currentRotation: [number, number, number] = [0, cursorRef.current.rotation.y, 0]
+      const currentRotation: [number, number, number] = [0, cursorGroupRef.current.rotation.y, 0]
 
       draftNode.commit(result.nodeUpdate)
       if (configRef.current.onCommitted()) {
@@ -237,8 +270,8 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
         gridPosition.current.z !== result.gridPosition[2]
 
       gridPosition.current.set(...result.gridPosition)
-      cursorRef.current.position.set(...result.cursorPosition)
-      cursorRef.current.rotation.y = result.cursorRotationY
+      cursorGroupRef.current.position.set(...result.cursorPosition)
+      cursorGroupRef.current.rotation.y = result.cursorRotationY
 
       const draft = draftNode.current
       if (draft && result.nodeUpdate) {
@@ -361,7 +394,7 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
 
       event.stopPropagation()
       gridPosition.current.set(...result.gridPosition)
-      cursorRef.current.position.set(...result.cursorPosition)
+      cursorGroupRef.current.position.set(...result.cursorPosition)
 
       revalidate()
 
@@ -441,12 +474,13 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
 
       if (rotationDelta !== 0) {
         event.preventDefault()
+        sfxEmitter.emit('sfx:item-rotate')
         const currentRotation = draft.rotation
         const newRotationY = (currentRotation[1] ?? 0) + rotationDelta
         draft.rotation = [currentRotation[0], newRotationY, currentRotation[2]]
 
         // Ref + cursor mesh + item mesh — no store update during drag
-        cursorRef.current.rotation.y = newRotationY
+        cursorGroupRef.current.rotation.y = newRotationY
         const mesh = sceneRegistry.nodes.get(draft.id)
         if (mesh) mesh.rotation.y = newRotationY
         revalidate()
@@ -468,7 +502,8 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
     const dims = asset.dimensions ?? DEFAULT_DIMENSIONS
     const boxGeometry = new BoxGeometry(dims[0], dims[1], dims[2])
     boxGeometry.translate(0, dims[1] / 2, 0)
-    cursorRef.current.geometry = boxGeometry
+    const edgesGeometry = new EdgesGeometry(boxGeometry)
+    edgesRef.current.geometry = edgesGeometry
 
     // ---- Subscribe ----
 
@@ -532,17 +567,26 @@ export function usePlacementCoordinator(config: PlacementCoordinatorConfig): Rea
           draftNode.current.rotation,
         )
         mesh.position.y = slabElevation
-        cursorRef.current.position.y = slabElevation
+        cursorGroupRef.current.position.y = slabElevation
       }
     }
   })
 
+  const dims = config.asset.dimensions ?? DEFAULT_DIMENSIONS
+  const initialBoxGeometry = new BoxGeometry(dims[0], dims[1], dims[2])
+  initialBoxGeometry.translate(0, dims[1] / 2, 0)
+
+  // Base plane geometry (colored rectangle on the ground)
+  const basePlaneGeometry = new PlaneGeometry(dims[0], dims[2])
+  basePlaneGeometry.rotateX(-Math.PI / 2) // Make it horizontal
+  basePlaneGeometry.translate(0, 0.01, 0) // Slightly above ground to avoid z-fighting
+
   return (
-    <group>
-      <mesh ref={cursorRef}>
-        <boxGeometry args={[0.1, 0.1, 0.1]} />
-        <meshStandardMaterial color="red" wireframe />
-      </mesh>
+    <group ref={cursorGroupRef}>
+      <lineSegments ref={edgesRef} material={edgeMaterial}>
+        <edgesGeometry args={[initialBoxGeometry]} />
+      </lineSegments>
+      <mesh ref={basePlaneRef} geometry={basePlaneGeometry} material={basePlaneMaterial} />
     </group>
   )
 }
diff --git a/apps/editor/components/tools/wall/wall-tool.tsx b/apps/editor/components/tools/wall/wall-tool.tsx
index adf08431..12c19860 100644
--- a/apps/editor/components/tools/wall/wall-tool.tsx
+++ b/apps/editor/components/tools/wall/wall-tool.tsx
@@ -98,6 +98,7 @@ export const WallTool: React.FC = () => {
   const startingPoint = useRef(new Vector3(0, 0, 0))
   const endingPoint = useRef(new Vector3(0, 0, 0))
   const buildingState = useRef(0)
+  const shiftPressed = useRef(false)
 
   useEffect(() => {
     let gridPosition: [number, number] = [0, 0]
@@ -111,8 +112,10 @@ export const WallTool: React.FC = () => {
       cursorRef.current.position.set(gridPosition[0], event.position[1], gridPosition[1])
 
       if (buildingState.current === 1) {
-        // Snap to 45° angles
-        const snapped = snapTo45Degrees(startingPoint.current, cursorPosition)
+        // Snap to 45° angles only if shift is not pressed
+        const snapped = shiftPressed.current
+          ? cursorPosition
+          : snapTo45Degrees(startingPoint.current, cursorPosition)
         endingPoint.current.copy(snapped)
 
         // Play snap sound only when the actual wall end position changes
@@ -143,12 +146,28 @@ export const WallTool: React.FC = () => {
       }
     }
 
+    const onKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Shift') {
+        shiftPressed.current = true
+      }
+    }
+
+    const onKeyUp = (e: KeyboardEvent) => {
+      if (e.key === 'Shift') {
+        shiftPressed.current = false
+      }
+    }
+
     emitter.on('grid:move', onGridMove)
     emitter.on('grid:click', onGridClick)
+    window.addEventListener('keydown', onKeyDown)
+    window.addEventListener('keyup', onKeyUp)
 
     return () => {
       emitter.off('grid:move', onGridMove)
       emitter.off('grid:click', onGridClick)
+      window.removeEventListener('keydown', onKeyDown)
+      window.removeEventListener('keyup', onKeyUp)
     }
   }, [])
 
@@ -156,8 +175,8 @@ export const WallTool: React.FC = () => {
     <group>
       {/* Cursor indicator */}
       <mesh ref={cursorRef}>
-        <boxGeometry args={[0.2, 0.2, 0.2]} />
-        <meshStandardMaterial color="red" />
+        <sphereGeometry args={[0.1, 16, 16]} />
+        <meshBasicMaterial color="#a3a3a3" depthTest={false} depthWrite={false} />
       </mesh>
 
       {/* Wall preview */}
diff --git a/apps/editor/components/ui/helpers/helper-manager.tsx b/apps/editor/components/ui/helpers/helper-manager.tsx
new file mode 100644
index 00000000..6db3e4ac
--- /dev/null
+++ b/apps/editor/components/ui/helpers/helper-manager.tsx
@@ -0,0 +1,24 @@
+'use client'
+
+import useEditor from '@/store/use-editor'
+import { ItemHelper } from './item-helper'
+import { WallHelper } from './wall-helper'
+
+export function HelperManager() {
+  const tool = useEditor((s) => s.tool)
+  const movingNode = useEditor((state) => state.movingNode)
+
+  if (movingNode) {
+    return <ItemHelper />
+  }
+  
+  // Show appropriate helper based on current tool
+  switch (tool) {
+    case 'wall':
+      return <WallHelper />
+    case 'item':
+      return <ItemHelper />
+    default:
+      return null
+  }
+}
diff --git a/apps/editor/components/ui/helpers/item-helper.tsx b/apps/editor/components/ui/helpers/item-helper.tsx
new file mode 100644
index 00000000..91345b4d
--- /dev/null
+++ b/apps/editor/components/ui/helpers/item-helper.tsx
@@ -0,0 +1,18 @@
+export function ItemHelper() {
+  return (
+    <div className="pointer-events-none fixed right-4 top-1/2 -translate-y-1/2 z-40 flex flex-col gap-2 rounded-lg border border-border bg-background/95 px-4 py-3 shadow-lg backdrop-blur-md">
+      <div className="flex items-center gap-2 text-sm">
+        <kbd className="rounded bg-muted px-2 py-1 text-xs font-medium">R</kbd>
+        <span className="text-muted-foreground">Rotate counterclockwise</span>
+      </div>
+      <div className="flex items-center gap-2 text-sm">
+        <kbd className="rounded bg-muted px-2 py-1 text-xs font-medium">T</kbd>
+        <span className="text-muted-foreground">Rotate clockwise</span>
+      </div>
+      <div className="flex items-center gap-2 text-sm">
+        <kbd className="rounded bg-muted px-2 py-1 text-xs font-medium">Esc</kbd>
+        <span className="text-muted-foreground">Cancel</span>
+      </div>
+    </div>
+  )
+}
diff --git a/apps/editor/components/ui/helpers/wall-helper.tsx b/apps/editor/components/ui/helpers/wall-helper.tsx
new file mode 100644
index 00000000..7e880e80
--- /dev/null
+++ b/apps/editor/components/ui/helpers/wall-helper.tsx
@@ -0,0 +1,10 @@
+export function WallHelper() {
+  return (
+    <div className="pointer-events-none fixed right-4 top-1/2 -translate-y-1/2 z-40 flex items-center gap-2 rounded-lg border border-border bg-background/95 px-4 py-2 shadow-lg backdrop-blur-md">
+      <div className="flex items-center gap-2 text-sm">
+        <kbd className="rounded bg-muted px-2 py-1 text-xs font-medium">Shift</kbd>
+        <span className="text-muted-foreground">Allow non-45° angles</span>
+      </div>
+    </div>
+  )
+}
diff --git a/apps/editor/components/ui/panels/item-panel.tsx b/apps/editor/components/ui/panels/item-panel.tsx
index 79ee38e5..e9360923 100644
--- a/apps/editor/components/ui/panels/item-panel.tsx
+++ b/apps/editor/components/ui/panels/item-panel.tsx
@@ -53,6 +53,7 @@ export function ItemPanel() {
 
   const handleDelete = useCallback(() => {
     if (!selectedId) return
+    sfxEmitter.emit('sfx:item-delete')
     deleteNode(selectedId as AnyNode['id'])
     setSelection({ selectedIds: [] })
   }, [selectedId, deleteNode, setSelection])
@@ -144,6 +145,7 @@ export function ItemPanel() {
                 type="button"
                 className="flex-1 rounded border border-border px-2 py-1.5 text-xs hover:bg-accent cursor-pointer"
                 onClick={() => {
+                  sfxEmitter.emit('sfx:item-rotate')
                   const currentDegrees = (node.rotation[1] * 180) / Math.PI
                   const newDegrees = currentDegrees - 90
                   const radians = (newDegrees * Math.PI) / 180
@@ -156,6 +158,7 @@ export function ItemPanel() {
                 type="button"
                 className="flex-1 rounded border border-border px-2 py-1.5 text-xs hover:bg-accent cursor-pointer"
                 onClick={() => {
+                  sfxEmitter.emit('sfx:item-rotate')
                   const currentDegrees = (node.rotation[1] * 180) / Math.PI
                   const newDegrees = currentDegrees + 90
                   const radians = (newDegrees * Math.PI) / 180
diff --git a/apps/editor/hooks/use-keyboard.ts b/apps/editor/hooks/use-keyboard.ts
index 4026277f..ce8ee20f 100644
--- a/apps/editor/hooks/use-keyboard.ts
+++ b/apps/editor/hooks/use-keyboard.ts
@@ -2,6 +2,7 @@ import { type AnyNodeId, useScene } from '@pascal-app/core'
 import { useViewer } from '@pascal-app/viewer'
 import { useEffect } from 'react'
 import useEditor from '@/store/use-editor'
+import { sfxEmitter } from '@/lib/sfx-bus'
 
 export const useKeyboard = () => {
   useEffect(() => {
@@ -47,6 +48,18 @@ export const useKeyboard = () => {
         const selectedNodeIds = useViewer.getState().selection.selectedIds as AnyNodeId[]
 
         if (selectedNodeIds.length > 0) {
+          // Play appropriate SFX based on what's being deleted
+          if (selectedNodeIds.length === 1) {
+            const node = useScene.getState().nodes[selectedNodeIds[0]!]
+            if (node?.type === 'item') {
+              sfxEmitter.emit('sfx:item-delete')
+            } else {
+              sfxEmitter.emit('sfx:structure-delete')
+            }
+          } else {
+            sfxEmitter.emit('sfx:structure-delete')
+          }
+
           useScene.getState().deleteNodes(selectedNodeIds)
         }
       }
diff --git a/apps/editor/lib/sfx-bus.ts b/apps/editor/lib/sfx-bus.ts
index 9bc74fe2..308718d2 100644
--- a/apps/editor/lib/sfx-bus.ts
+++ b/apps/editor/lib/sfx-bus.ts
@@ -9,6 +9,7 @@ type SFXEvents = {
   'sfx:item-delete': undefined
   'sfx:item-pick': undefined
   'sfx:item-place': undefined
+  'sfx:item-rotate': undefined
   'sfx:structure-build': undefined
   'sfx:structure-delete': undefined
 }
@@ -29,6 +30,7 @@ export function initSFXBus() {
   sfxEmitter.on('sfx:item-delete', () => playSFX('itemDelete'))
   sfxEmitter.on('sfx:item-pick', () => playSFX('itemPick'))
   sfxEmitter.on('sfx:item-place', () => playSFX('itemPlace'))
+  sfxEmitter.on('sfx:item-rotate', () => playSFX('itemRotate'))
   sfxEmitter.on('sfx:structure-build', () => playSFX('structureBuild'))
   sfxEmitter.on('sfx:structure-delete', () => playSFX('structureDelete'))
 }
diff --git a/apps/editor/lib/sfx-player.ts b/apps/editor/lib/sfx-player.ts
index 402eb446..f305893e 100644
--- a/apps/editor/lib/sfx-player.ts
+++ b/apps/editor/lib/sfx-player.ts
@@ -7,6 +7,7 @@ export const SFX = {
   itemDelete: '/audios/sfx/item_delete.mp3',
   itemPick: '/audios/sfx/item_pick.mp3',
   itemPlace: '/audios/sfx/item_place.mp3',
+  itemRotate: '/audios/sfx/item_rotate.mp3',
   structureBuild: '/audios/sfx/structure_build.mp3',
   structureDelete: '/audios/sfx/structure_delete.mp3',
 } as const
diff --git a/apps/editor/public/audios/sfx/item_rotate.mp3 b/apps/editor/public/audios/sfx/item_rotate.mp3
new file mode 100644
index 00000000..e5c94a6a
Binary files /dev/null and b/apps/editor/public/audios/sfx/item_rotate.mp3 differ
diff --git a/apps/editor/store/use-audio.tsx b/apps/editor/store/use-audio.tsx
index 6f8759b1..4f43964d 100644
--- a/apps/editor/store/use-audio.tsx
+++ b/apps/editor/store/use-audio.tsx
@@ -21,7 +21,7 @@ const useAudio = create<AudioState>()(
     (set) => ({
       masterVolume: 70,
       sfxVolume: 50,
-      radioVolume: 50,
+      radioVolume: 25,
       muted: false,
       autoplay: true,
       setMasterVolume: (v) => set({ masterVolume: v }),