emissiveIntensity range?

[liuyug]

Default value of emissiveIntensity is 1 and not any description about range.

The emissiveFactor range in gltf is 0..1

In GLTFExporter.js the emissiveFactor will be calculated by emissiveColor * emissiveIntensity.

Have no any range checking so it will be generated a ERROR gltf file.

[Mugen87]

Related KhronosGroup/glTF#1083.

[Mugen87]

Yes, it seems this part of the exporter is not spec compliant. Since GLTFLoader does only this:

three.js/examples/jsm/loaders/GLTFLoader.js

Line 2945 in 3eaf19a

materialParams.emissive = new Color().fromArray( materialDef.emissiveFactor );

GLTFExporter could do something similar and not honor emissiveIntensity for now.