Issues

• Align release playwright tests with shipped sandcastle examples

  CesiumGS/cesium#13924 · Filter by author lukemckinstry opened on Oct 13, 2026
  

• Establish policy and auto-close action for stale PRs

  theme - developer comfort
  CesiumGS/cesium#13923 · Filter by author jjhembd opened on Oct 13, 2026
  1

• approximateTerrainHeights.json: since 1.115 each tile's new values sit on the tile mirrored across the equator — clamped polylines vanish over deep ocean

  needs triagetype - bug
  CesiumGS/cesium#13912 · Filter by author BenDyson-Arch opened on Oct 12, 2026
  1

• (Layers API) 3D Tiles 2.0 layer API support

  type - enhancement
  Feature

  CesiumGS/cesium#13910 · Filter by author markschlosseratbentley opened on Oct 9, 2026

• Draped vector lines are not pickable and globe imagery can exceed the fragment sampler budget in CesiumJS 1.145

  category - vector datatype - bug
  CesiumGS/cesium#13909 · Filter by author Cpu1998 opened on Oct 9, 2026
  2

  

• Flat geometry within one meter above a 2D multifrustum boundary is not rendered.

  needs triagetype - bug
  CesiumGS/cesium#13905 · Filter by author roderickgreen opened on Oct 8, 2026

• Lazy load tiles in Cesium3DTileset layers that are hidden

  category - 3d tilestype - enhancement
  CesiumGS/cesium#13904 · Filter by author markschlosseratbentley opened on Oct 8, 2026

• Types: @ts-check and the type-definition generator disagree on namespaced typedefs/callbacks

  CesiumGS/cesium#13903 · Filter by author lukemckinstry opened on Oct 8, 2026
  7

• (Layers API) List and allow toggling of layers from a Cesium3DTileset (layer = 3D Tiles 1.1 group)

  category - 3d tilestype - enhancement
  CesiumGS/cesium#13902 · Filter by author markschlosseratbentley opened on Oct 8, 2026
  1

  

• Make Cesium3DTileset.pick(ray) public, for CPU ray casts against loaded tiles

  needs triagetype - enhancement
  CesiumGS/cesium#13901 · Filter by author fredj opened on Oct 8, 2026
  1

• External tileset content.group resolves against the root tileset's groups

  category - 3d tilestype - bug
  CesiumGS/cesium#13900 · Filter by author markschlosseratbentley opened on Oct 7, 2026
  

• Remove build-watch and build-docs-watch scripts

  category - packaging & toolingtheme - developer comforttype - cleanup
  CesiumGS/cesium#13898 · Filter by author jjhembd opened on Oct 7, 2026

• Atmosphere GLSL builtins don't match the rendered sky (light intensity and light direction)

  CesiumGS/cesium#13897 · Filter by author fredj opened on Oct 7, 2026
  1

• Heap.insert keeps a reference to the element it pushes out past maximumLength (RequestScheduler can retain a destroyed tileset)

  CesiumGS/cesium#13894 · Filter by author Lampenbauer opened on Oct 6, 2026

• PathGraphics: jitter between intervals when trailing path moves

  CesiumGS/cesium#13893 · Filter by author eringram opened on Oct 5, 2026
  

• PolygonGeometry.createGeometry throws "cartesian has a NaN component" for wide equator-crossing polygons (regression from #11874)

  needs triagetype - bug
  CesiumGS/cesium#13882 · Filter by author shurekov opened on Oct 2, 2026

• @cesium/engine 26.4.0 typings: Transforms.eastNorthUpToFixedFrame is missing

  category - typescripttype - bugtype - regression
  CesiumGS/cesium#13881 · Filter by author fredj opened on Oct 2, 2026
  2

  

• BufferPrimitiveCollection: collection.sort() invalidates vertex array buffers

  needs triagetype - bug
  CesiumGS/cesium#13869 · Filter by author donmccurdy opened on Sep 30, 2026

• Internal constant after JSDoc type import appears in public documentation

  category - doccategory - typescripttype - cleanup
  CesiumGS/cesium#13866 · Filter by author jjhembd opened on Sep 30, 2026
  5

  

• Improve EXT_mesh_primitive_edge_visibility tile load time via better edge key lookups

  category - 3d tilestype - bug
  Bug

  CesiumGS/cesium#13864 · Filter by author markschlosseratbentley opened on Sep 30, 2026
  

• Instanced primitive bounding spheres ignore instance rotation and scale (EXT_mesh_gpu_instancing)

  needs triagetype - bug
  CesiumGS/cesium#13860 · Filter by author scottmcnab opened on Sep 29, 2026
  4

• Allow configuring default dynamic environment map options

  needs triagetype - enhancement
  CesiumGS/cesium#13859 · Filter by author malaretv opened on Sep 29, 2026

• Remove @cesium/core re-export deprecation shims in 1.150

  remove in 1.150
  CesiumGS/cesium#13854 · Filter by author jjhembd opened on Sep 26, 2026

• SCENE2D mouse-wheel zoom targets wrong location across wrapped map boundary

  needs triagetype - bug
  CesiumGS/cesium#13849 · Filter by author willpace opened on Sep 23, 2026

• Mesh Editing: QA + Performance Testing

  Task

  CesiumGS/cesium#13846 · Filter by author mzschwartz5 opened on Sep 22, 2026