diff --git a/renderer/viewer/three/shadersThree.ts b/renderer/viewer/three/shadersThree.ts
new file mode 100644
index 00000000..052b9009
--- /dev/null
+++ b/renderer/viewer/three/shadersThree.ts
@@ -0,0 +1,94 @@
+import { ShaderChunk } from 'three'
+
+// Original simple shader for non-animated blocks
+export const BLOCK_VERTEX_SHADER = `
+#include <common>
+${ShaderChunk.logdepthbuf_pars_vertex}
+
+attribute vec3 color;
+
+varying vec2 vUv;
+varying vec3 vColor;
+
+void main() {
+  vUv = uv;
+  vColor = color;
+  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
+
+  ${ShaderChunk.logdepthbuf_vertex}
+}
+`
+
+export const BLOCK_FRAGMENT_SHADER = `
+#include <common>
+${ShaderChunk.logdepthbuf_pars_fragment}
+
+uniform sampler2D map;
+varying vec2 vUv;
+varying vec3 vColor;
+
+void main() {
+  vec4 texColor = texture2D(map, vUv);
+  if (texColor.a < 0.1) discard;
+  gl_FragColor = vec4(vColor * texColor.rgb, texColor.a);
+
+  ${ShaderChunk.logdepthbuf_fragment}
+}
+`
+
+// New shader for animated blocks
+export const ANIMATED_BLOCK_VERTEX_SHADER = `
+#include <common>
+${ShaderChunk.logdepthbuf_pars_vertex}
+
+uniform float animationFrameHeight;
+uniform float animationFrameIndex;
+uniform float animationInterpolationFrameIndex;
+uniform float animationInterpolation;
+
+attribute vec3 color;
+varying vec2 vUv;
+varying vec3 vColor;
+varying float vAnimationInterpolation;
+
+void main() {
+  vUv = uv;
+  vColor = color;
+  vAnimationInterpolation = animationInterpolation;
+  gl_Position = projectionMatrix * modelViewMatrix * vec4(position, 1.0);
+
+  ${ShaderChunk.logdepthbuf_vertex}
+}
+`
+
+export const ANIMATED_BLOCK_FRAGMENT_SHADER = `
+#include <common>
+${ShaderChunk.logdepthbuf_pars_fragment}
+
+uniform sampler2D map;
+uniform float animationFrameHeight;
+uniform float animationFrameIndex;
+uniform float animationInterpolationFrameIndex;
+
+varying vec2 vUv;
+varying vec3 vColor;
+varying float vAnimationInterpolation;
+
+void main() {
+  // Calculate UV coordinates for current frame
+  vec2 currentFrameUv = vec2(vUv.x, animationFrameHeight * (vUv.y + animationFrameIndex));
+  vec4 currentFrame = texture2D(map, currentFrameUv);
+
+  // If interpolation is enabled, calculate UV for next frame and mix
+  if (vAnimationInterpolation > 0.0) {
+    vec2 nextFrameUv = vec2(vUv.x, animationFrameHeight * (vUv.y + animationInterpolationFrameIndex));
+    vec4 nextFrame = texture2D(map, nextFrameUv);
+    currentFrame = mix(currentFrame, nextFrame, vAnimationInterpolation);
+  }
+
+  if (currentFrame.a < 0.1) discard;
+  gl_FragColor = vec4(vColor * currentFrame.rgb, currentFrame.a);
+
+  ${ShaderChunk.logdepthbuf_fragment}
+}
+`
diff --git a/renderer/viewer/three/worldrendererThree.ts b/renderer/viewer/three/worldrendererThree.ts
index 14270367..117d631d 100644
--- a/renderer/viewer/three/worldrendererThree.ts
+++ b/renderer/viewer/three/worldrendererThree.ts
@@ -25,10 +25,49 @@ import { Entities } from './entities'
 import { ThreeJsSound } from './threeJsSound'
 import { CameraShake } from './cameraShake'
 import { ThreeJsMedia } from './threeJsMedia'
+import { BLOCK_VERTEX_SHADER, BLOCK_FRAGMENT_SHADER, ANIMATED_BLOCK_VERTEX_SHADER, ANIMATED_BLOCK_FRAGMENT_SHADER } from './shadersThree'
 import { Fountain } from './threeJsParticles'
 
 type SectionKey = string
 
+class CustomBlockMaterial extends THREE.ShaderMaterial {
+  constructor () {
+    super({
+      uniforms: {
+        map: { value: null }
+      },
+      vertexShader: BLOCK_VERTEX_SHADER,
+      fragmentShader: BLOCK_FRAGMENT_SHADER,
+      transparent: true,
+      alphaTest: 0.1,
+      depthWrite: true,
+      depthTest: true,
+      side: THREE.FrontSide
+    })
+  }
+}
+
+class AnimatedBlockMaterial extends THREE.ShaderMaterial {
+  constructor () {
+    super({
+      uniforms: {
+        map: { value: null },
+        animationFrameHeight: { value: 1 },
+        animationFrameIndex: { value: 0 },
+        animationInterpolationFrameIndex: { value: 0 },
+        animationInterpolation: { value: 0 }
+      },
+      vertexShader: ANIMATED_BLOCK_VERTEX_SHADER,
+      fragmentShader: ANIMATED_BLOCK_FRAGMENT_SHADER,
+      transparent: true,
+      alphaTest: 0.1,
+      depthWrite: true,
+      depthTest: true,
+      side: THREE.FrontSide
+    })
+  }
+}
+
 export class WorldRendererThree extends WorldRendererCommon {
   outputFormat = 'threeJs' as const
   sectionObjects: Record<string, THREE.Object3D & { foutain?: boolean }> = {}
@@ -36,14 +75,15 @@ export class WorldRendererThree extends WorldRendererCommon {
   signsCache = new Map<string, any>()
   starField: StarField
   cameraSectionPos: Vec3 = new Vec3(0, 0, 0)
-  holdingBlock: HoldingBlock
-  holdingBlockLeft: HoldingBlock
+  holdingBlock: HoldingBlock | undefined
+  holdingBlockLeft: HoldingBlock | undefined
   scene = new THREE.Scene()
   ambientLight = new THREE.AmbientLight(0xcc_cc_cc)
   directionalLight = new THREE.DirectionalLight(0xff_ff_ff, 0.5)
   entities = new Entities(this)
   cameraObjectOverride?: THREE.Object3D // for xr
-  material = new THREE.MeshLambertMaterial({ vertexColors: true, transparent: true, alphaTest: 0.1 })
+  material = new CustomBlockMaterial()
+  animatedMaterial = new AnimatedBlockMaterial()
   itemsTexture: THREE.Texture
   cursorBlock = new CursorBlock(this)
   onRender: Array<() => void> = []
@@ -168,23 +208,23 @@ export class WorldRendererThree extends WorldRendererCommon {
   changeHandSwingingState (isAnimationPlaying: boolean, isLeft = false) {
     const holdingBlock = isLeft ? this.holdingBlockLeft : this.holdingBlock
     if (isAnimationPlaying) {
-      holdingBlock.startSwing()
+      holdingBlock?.startSwing()
     } else {
-      holdingBlock.stopSwing()
+      holdingBlock?.stopSwing()
     }
   }
 
   async updateAssetsData (): Promise<void> {
     const resources = this.resourcesManager.currentResources!
 
-    const oldTexture = this.material.map
+    const oldTexture = this.material.uniforms.map.value
     const oldItemsTexture = this.itemsTexture
 
     const texture = await new THREE.TextureLoader().loadAsync(resources.blocksAtlasParser.latestImage)
     texture.magFilter = THREE.NearestFilter
     texture.minFilter = THREE.NearestFilter
     texture.flipY = false
-    this.material.map = texture
+    this.material.uniforms.map.value = texture
 
     const itemsTexture = await new THREE.TextureLoader().loadAsync(resources.itemsAtlasParser.latestImage)
     itemsTexture.magFilter = THREE.NearestFilter
@@ -208,10 +248,14 @@ export class WorldRendererThree extends WorldRendererCommon {
   }
 
   onAllTexturesLoaded () {
-    this.holdingBlock.ready = true
-    this.holdingBlock.updateItem()
-    this.holdingBlockLeft.ready = true
-    this.holdingBlockLeft.updateItem()
+    if (this.holdingBlock) {
+      this.holdingBlock.ready = true
+      this.holdingBlock.updateItem()
+    }
+    if (this.holdingBlockLeft) {
+      this.holdingBlockLeft.ready = true
+      this.holdingBlockLeft.updateItem()
+    }
   }
 
   changeBackgroundColor (color: [number, number, number]): void {
@@ -464,8 +508,8 @@ export class WorldRendererThree extends WorldRendererCommon {
     this.renderer.render(this.scene, cam)
 
     if (this.displayOptions.inWorldRenderingConfig.showHand/*  && !this.freeFlyMode */) {
-      this.holdingBlock.render(this.camera, this.renderer, this.ambientLight, this.directionalLight)
-      this.holdingBlockLeft.render(this.camera, this.renderer, this.ambientLight, this.directionalLight)
+      this.holdingBlock?.render(this.camera, this.renderer, this.ambientLight, this.directionalLight)
+      this.holdingBlockLeft?.render(this.camera, this.renderer, this.ambientLight, this.directionalLight)
     }
 
     for (const fountain of this.fountains) {