Key frames on the Shaders Alpha channel will not export

[SarahMCollier]

Hi,

I would like to have an object's transparency fade off over time. I assumed that keying the alpha in the shader would be fine. However, the keyframes are not exporting.

Please see the screen grab below for further information:

[ziriax]

I missed this issue, mea culpa.

Unfortunately, glTF doesn't support material animation AFAIK

https://blender.stackexchange.com/questions/263473/cant-export-gltf-with-alpha-value-animation

To work around this, you would need to create a dummy transform with some known name, and then animate a supported channel on it (e.g. Translate, rotate, scale) and then write some code to copy that to the material alpha.

An extension exists that allows animating any property, but this plug-in doesn't support that yet.

BabylonJS/Babylon.js#12544

Pull requests are welcome 😁