THREE.JS / FOUNDATIONS 254

Store only the changed vertices.

glTF sparse accessors keep a zero-initialized base and replace only the entries that differ. The two panels below exercise that rule as a morph-target attribute and as an animation-output accessor.

Initializing -

Preparing the renderer and generated glTF fixture.

Meshes: -
Morph attrs: -
Sparse accessors: -
Changed entries: -

Accessor inspectionloader expansion

Selected specimen

accessor: -
base storage: -
sparse replacements: -
resolved BufferAttribute: -
payload comparison: -

Select a panel to inspect its authored accessor and expanded runtime values.

Morph targetrelative POSITION deltas

Manual influence 0.00

Show changed vertices

Sparse animation outputSCALAR weights

right-panel influence 0.00

Inspectionrenderer + lifecycle

Wireframe Auto-rotate

glTF sparse data -> BufferAttribute -> morph/animation -> render

Drag to orbit · scroll to dolly · use ?forceWebGL=1 for a WebGL2 comparison.

Next: glTF cameras + punctual lights ->

LAB 254 / GLTF SPARSE ACCESSORS