THREE.JS / FOUNDATIONS 246

Make the glow a material property.

Core glTF emission is bounded; KHR_materials_emissive_strength raises the material's upper limit. Four loader-created PBR materials make the difference between emissive color, map, strength, and external lighting visible.

Preparing glTF fixture—

Building four emissive materials and a loader-parsed strength asset…

backend: —
materials: —
strengths: —
focus: —
frame ms: —

Emissive material controlswaiting

material focus material scale 1.00× key light intensity 3.20 tone exposure 0.85

use emissive map key light wireframe auto-rotate camera

The loader will map emissiveStrength into Three.js material intensity.

Emissive strength contractwaiting

core baselineno extension · 1.0

sub-unitstrength 0.35

brightstrength 4.0

HDR herostrength 12.0

core boundemissiveFactor + map

waiting

sub-unitextension multiplier

waiting

HDR emissionstrength above 1

waiting

hero materialtone-mapped output

waiting

loader resultemissiveIntensity

waiting

light independenceexternal key light

waiting

The extension multiplies the core emissive value; it does not replace emissiveFactor or emissiveTexture, and emission alone does not illuminate neighboring objects.

The study uses GLTFLoader's native KHR_materials_emissive_strength path and tracks every parsed material, map, geometry, environment, and renderer resource for release.

Derived from the official emissive bloom example, GLTFLoader, MeshStandardMaterial, and the Khronos KHR_materials_emissive_strength contract. Use ?forceWebGL=1 to inspect the labeled WebGL2 reference.

LAB 246 / GLTF EMISSIVE STRENGTH