https://github.com/mrdoob/three.js/wiki/Migration-Guide#r140--r141 https://github.com/mrdoob/three.js/milestone/54?closed=1

• Global
  • Remove legacy code below r130. #24034 (@Mugen87)
  • Avoid unnecessary prototype access. #24036, #24060, #24069, #24061, #24047, #24092, #24105 (@marcofugaro, @Mugen87)
  • Move deprecated properties and methods to classes. #24040, #24044 (@Mugen87)
• DepthTexture
  • Change default type to UnsignedIntType. #24019 (@wmcmurray)
• ExtrudeGeometry
  • Fix .toJSON() when using extrudePath. #24013 (@Mugen87)
• Interpolant
  • Remove beforeStart_() and afterEnd_() alias definitions. #24076 (@Mugen87)
• MeshPhysicalMaterial
  • Support iridescence / thin-film materials. #23869, e60a8027463e04b0a6b060c3537798e599086c58 (@PascalSchoen, @mrdoob)
• Object3D
  • Honor recursive parameter of copy() in subclasses. #24119 (@frading)
• ObjectLoader
  • Check type of Source.data for loading images. #24067 (@fluxxu)
• WebGLRenderer
  • Stop checking for FramebufferTexture in .copyFramebufferToTexture(). #23964 (@chubei-oppen)
  • Listen to webglcontextcreationerror event. #24091 (@mrdoob)
• WebGLMultipleRenderTargets
  • Add multisampling support. #24001(@RenaudRohlinger)
• WebGLProgram
  • Improve error logging.#24130, #24131 (@LeviPesin, @marcofugaro)
• WebGLTextures
  • Avoid redundant calls of texStorage2D(). #24095 (@Mugen87)
• WebXRManager
  • Add undefined check in onSessionEnd(). #23984, #24015 (@kalegd, @Mugen87)
  • Fix caching of baseReferenceFrame and teleport example. #24058 (@richardanaya)
  • Support more than two views. #23972 (@CodyJasonBennett)

Documentation

• Add support for code highlighting. #24079 (@sunag)
• Improve Chinese translation. #23985, #24070 (@linbingquan, @qq284590533)
• Improve Texture page. #24041 (@dghez)
• Improve WebGLRenderer page. #24008, #24054 (@Mugen87)
• Improve Creating a scene guide. #24120, #24126 (@oskar1233, @Mugen87)
• Improve How to run things locally guide. #24097 (@donmccurdy)
• Improve FAQ. #24116 (@Mugen87, @looeee)

Manual

• Improve Responsive page. #24023 (@exxnnonymous)
• Improve Primitives page. #24026 (@taenykim)
• Improve Chinese translation. #24000, #24012, #24063, #24132 (@writey, @MongooseSong)
• Improve Korean translation. #23977 (@nerdchanii)

Examples

• Clean up. #23993, #24121, #24118, b5ec27609676f3caac48434302d3fb296553572a (@jkristensen, @LeviPesin, @Mugen87, @mrdoob)
• Added webgpu_cubemap_mix example. #24059 (@sunag)
• Remove deprecated Geometry class and all legacy checks. #24009 (@Mugen87)
• Added webgl_loader_gltf_iridescence example. c26896dfaececdd007c5f04b1b6de0275172b093 (@mrdoob)
• Unified MRT examples. 764cf0fa5919e891bc259253e0464dc8033d5fcd (@mrdoob)

• 3DMLoader

  • Remove usage of THREE namespace. #24075 (@Mugen87)

• CSS2DRenderer

  • Remove position rounding for Safari. #24122 (@fanciful-marmot)

• DDSLoader

  • Remove FourCC header check. #24124 (@LeviPesin)

• EXRLoader

  • Enable long-name attribute flag. #24049 (@sciecode)

• GLTFExporter

  • Remove embedImages option. #24003 (@Mugen87)
  • Fix export when using OffscreenCanvas. #24031 (@LeviPesin)
  • Fix handling of shared buffer attributes with morph data. #24090 (@Mugen87)

• GPUStatsPanel

  • Prevent infinite loop when WebGL context is lost. #23990 (@wmcmurray)

• HTMLMesh

  • Add some more input types and support rounded rectangles. #24030 (@AdaRoseCannon)

• KTX2Exporter

  • Add new exporter. #24102 (@donmccurdy)

• NodeMaterial

  • Add support for IBLs + PBR. #24038 (@sunag)
  • nodeType of AttributeNode is now optional. #24050 (@sunag)
  • Add .customProgramCacheKey(). #24096 (@sunag)
  • Fix dpdx and dpdy called from non-uniform control flow in NormalMapNode. #24062 (@sunag)
  • Add .construct() and some architectural changes. #24110 (@sunag)
  • Add sprites and support for InterleavedBufferAttribute. #24117 (@sunag)

• RGBELoader

  • Simplify texture configuration. #24032 (@deepkolos)

• SelectionHelper

  • Remove unused parameter from constructor. #24057 (@CarlBateman)

• WebGPURenderer

  • Improve approach to generate mipmaps of a CubeMap. #23988 (@sunag)
  • Update to latest WebGPU API. #24021 (@sunag)
  • Setting an explicit size in configure() has been deprecated. #24098 (@sunag)

Editor

• Clean up. f36dad49fbc5f8c38d1e9d4132c7863ea2d55c7e (@mrdoob)
• Add basic support for showing morph targets. #24084 (@Mugen87)
• Add PCDLoader. #24106 (@Mugen87)
• Add Selector. #23902 909350e65984006757cf2ea6d851181be14dd644, 4e0930a3ca7c026ba9ff47473a0931197f6a9549 (@linbingquan, @mrdoob)
• Ignore chrome-extension scheme in sw.js. (@mrdoob)