https://github.com/mrdoob/three.js/wiki/Migration-Guide#r126--r127 https://github.com/mrdoob/three.js/milestone/40?closed=1

• Core
  • More usage of ES6 features. #21407, #21545 (@beginor, @linbingquan)
  • Add test-treeshake script. #21437 (@marcofugaro)
  • Remove some deprecated methods. #21450 (@marcofugaro)
• BufferAttribute
  • Add .name, .usage, .updateRange serialization. #21279 (@takahirox)
• BufferGeometry
  • Clarify serialization of buffer attributes. #21464 (@Mugen87)
• EventDispatcher
  • Remove target references after event dispatch. #18564 (@aardgoose)
• ImageUtils
  • Added warning when saving image as jpg in getDataURL(). #21386 (@mrdoob)
• InstancedMesh
  • Honor instanceColor in .toJSON() and ObjectLoader. #21486, 2f1fa4ea6ba68700a16eabfbc4bc681f929ea089 (@Michael4d45, @mrdoob)
• InterleavedBufferAttribute
  • Add applyNormalMatrix() and transformDirection(). #21434 (@devnev)
• Line/Points
  • Avoid raw array access in .raycast(). #21475 (@Mugen87)
  • Support drawRange in .raycast(). #21481 (@Mugen87)
• Material
  • Add alphaToCoverage. #21383 (@Mugen87)
  • Honor missing properties in .toJSON() and MaterialLoader. #21428 (@frading)
  • Add vertex color alpha support. #20975, #21530 (@chubei, @mrdoob)
• MathUtils
  • Added .inverseLerp(). #21544, #21547 (@Hoodgail, @Mugen87)
• PointLightShadow
  • Use PointLight.distance for far value if set. #21526 (@Mugen87)
• Plane
  • Return null instead of undefined in .intersectLine(). #21468 (@Mugen87)
• Quaternion
  • Use Number.EPSILON in .setFromUnitVectors(). #21484 (@Mugen87, @WestLangley)
  • Add .slerpQuaternions(), deprecate static .slerp(). #21532 (@Mugen87)
• RoughnessMipmapper
  • Preserve texture UV transform. #21511 (@zeux)
• Sphere
  • Add .expandByPoint() and .union(). #21493 (@Mugen87)
• SpotLightShadow
  • Add missing .copy() method. #21527 (@Mugen87)
• WebGLBackground
  • Remove support for WebGLCubeRenderTarget. #21360 (@Mugen87)
• WebGLRenderer
  • Move invocation of Scene.onAfterRender(). #21362 (@Mugen87)
  • Add support for multiple programs per material. #20135 (@Mugen87)
  • Refactor framebuffer state management. #21447, #21442, #21518 (@Mugen87)
  • Release cache at the end of .render(). #14946 (@takahirox, @Mugen87)
  • Remove morph target properties. #21522 (@Mugen87)
  • Do not run window.rAF when in XR. #21529 (@Mugen87)
• WebGLShadowMap
  • Ensure to use the latest reference to WebGLObjects. #21452 (@Mugen87)
• WebGLState
  • Improve viewport and scissor setup. #21440 (@Mugen87)
• WebGLTextures
  • Fix render texture re-uploaded on first use. #21455 (@DavidPeicho)
• WebGLUniforms
  • Add unsigned vector array support for uniform. #21316 (@SuperSodaSea)
• WebXRController
  • Make targetRay available in hands mode. #21368 (@fe1ixz)

Documentation

• Clean up. #21354, #21408, #21429, #21478, #21491 (@jj-plane, @Mugen87, @mcharytoniuk, @Vyse12138)
• Added ?q= support. #21460 (@mrdoob)
• Call updateFilter() only when ?q= is set. #21462 (@mrdoob)
• Clarify restrictions of Texture.offset and repeat. #21473 (@Mugen87)
• Started with Japanese translation. #21474 (@na2shell)
• Use AudioNode as type for Audio.filters. #21523 (@Mugen87)
• Improved material browser. 5a51f73e7bdf5b89d58af9b12914bbb16602032a, f9a36387326dcb22a2eef2d1946a3a20523c894e, ec5926a7ce8af6124820fc391a7f01296dd6ac6b, e5e3f069abafa0b0823d09307c0d92de036f2610, e93bffad7a138a3b66d47b7dcb6395bdc71ecf0d, 9fb402cfe8a774fa88254d52aa464c16d40873bd, b50ebc8f742e39b721233f491da5abed0c99b306 (@mrdoob)

Examples

• Clean up. #21432, #21449, #21471, #21482, #21499, #21513, #21541, #21549, 160344f3ebdea316ccf9411c88083a12dc1ae077, 024cfe8759d2ecd025d8e7445c65e9d09a57c4e7, 98c06041e28fa1cf7011d5b0a79ef83fd7428173, 795a26d1b35884bbd01b9744dd890e2e74d304b1, 0e8e04305a1d9c47997e6e85773dc6c8be3dc79a, 02f4dff06e26304ce67b98f0777786f3ca9428a6 (@Mugen87, @Dvvarf, @yomboprime, @mrdoob)
• Remove calls of stopPropagation(). #21348 (@Mugen87)
• Adopt importmaps in WebGPU examples. #21364 (@mrdoob)
• Move type flags back to prototype. #21378 (@linbingquan)
• Improved webgl_materials_wireframe demo. #21389, #21390, #21402, #21410 (@gkjohnson, @Mugen87, @mrdoob, @WestLangley)
• Remove alpha option from webgl_shaders_ocean.html example. #21393 (@Mugen87)
• Bump MMDParser lib to the latest one. #21397 (@takahirox)
• Better show WebGL2 error messages. #21400 (@Mugen87)
• Removed misc_legacy example. #21417 (@mrdoob)
• Add webgl_shadowmap_progressive example. #21435 (@zalo)
• Remove AssimpLoader. #21459 (@Mugen87)
• Fix color values in webgl_materials_envmaps_parallax example. #21363 (@1993heqiang)
• Introduced DebugEnvironment. 34519f5073c32eca2cf8b571ce03d44a5a80476a (@mrdoob)
• More usage of Pointer Events. #21494, #21504 (@Oletus, @Mugen87)
• Fix pixel trails in webgl_gpgpu_protoplanet example. #21510 (@yomboprime)
• Simplify webgl2_rendertarget_texture2darray example. #21520 (@Mugen87)
• Replace Event.keyCode with Event.code. #21409 (@puxiao)
• Add post processing fullscreen triangle optimization. #21358 (@trinketmage)

• CSS2DRenderer

  • Round values used for translation (Safari-only). #21416 (@simondate)

• DeviceOrientationControls

  • Add isSecureContext check. #21528 (@Mugen87, @mrdoob)

• DragControls

  • Ensure hoveroff is fired correctly. #21376 (@tb2k)

• FunctionNode

  • Improve regex. #21356 (@Mugen87)

• IFCLoader

  • Added new loader. #20598 (@agviegas)

• Line2

  • Add support for Alpha To Coverage. #21451 (@gkjohnson)

• LineSegments2

  • Check bounding box and bounding sphere when raycasting. #21496 (@gkjohnson)

• LUTPass

  • Fix usage with WebGL1. #21531 (@gkjohnson)

• MMDLoader

  • Improve animation system for PMX. #21395, #21398 (@takahirox, @ingbunga)

• OutlinePass

  • Ensure renderTargetDepthBuffer is resized correctly. #21436 (@Julianouyang)

• ReflectorForSSRPass

  • Fixed feedback and improved robustness. #21385 (@ycw)
  • Expose color. #21506 (@ycw)

• SSRPass

  • Fixed MAX_STEP. #21384 (@ycw)
  • Correct reflector depth. #21403, #21537 (@gonnavis)

• SSRrPass

  • Add new pass for screen space refraction. #21420 (@gonnavis)

• SVGLoader

  • Apply default values when using getAttribute(). #21469 (@Mugen87)
  • Implement custom createShapes() method. #21380 (@Ttommeke)
  • Fix parsing of flags in compressed definitions. #21485 (@Mugen87)

• TGALoader

  • Derive from DataTextureLoader. #21377 (@deepkolos)

• Water

  • Removed outputEncoding and toneMapping checks. #21418 (@mrdoob)

• WebGPURenderer

  • Clean up. #21367 (@Mugen87)
  • Update .requestDevice() descriptor to the latest API. #21366 (@Mugen87)
  • Update to latest vertex formats. #21381 (@Mugen87)
  • Fix rendering of line segments. #21443 (@Mugen87)
  • Follow the latest GPURenderPipelineDescriptor format. #21472 (@takahirox)

Editor

• Clean up. c45fd2036cce74c24ed31c1d907f888e01050fb6 (@mrdoob)
• Improved Chinese translation. #21374 (@linbingquan)
• Improved i18n. #21454 (@1993heqiang)
• Fixed size and sizeAttenuation UI visibility handling. #21422 (@mrdoob)
• Improved ShaderMaterial panel. #21423 (@mrdoob)
• Fixed grid depth glitches. #21430 (@mrdoob)
• Changed ffmpeg video quality setting. 3e79ce410e9b9dd219a2b2a4dd85ffc7c8ffb504 (@mrdoob)
• Reset time in app.js’s .start() function. e4c5838786df988d13a3d3b44559c92e68b9f14f (@mrdoob)
• Added modelviewer environment. b2dde2945663dadbeee2e3e64f17ebd6c73a8eee (@mrdoob)
• Added XRControllerModelFactory to sw.js. 84c4a6dcb417f2562c4597ea687f4cd342d884d1 (@mrdoob)
• Improved video progress bar. 27def9d26a56e80fd3cb2739598e9716bab123b0 (@mrdoob)
• Implement cache per update. 412b99a7f26e117ea97f40eb53d010ab81aa3279 (@mrdoob)
• Removed 3* extensions from Loader. ca5f932340864a73918edc6d85410c24e26a070f (@mrdoob)
• Added IFC files support. #21551 (@mrdoob)

Tests

• Add unit test for Mesh.raycast(). #21399 (@Mugen87)