GLTF Model doesn't move with skeleton when using datGUI on mobile only.

GLTF Model doesn’t move with skeleton when using datGUI on mobile only.

Describe the bug or feature request in detail. I have used GLTFLoader to load the model that was exported from blender with gltf-IO and datGUI to control the skeleton. It works flawlessly on desktop, but not on mobile. This for sure is true for Chrome 80 on Android 8. With SkeletonHealper I can see that bones are in fact moving, just not the mesh. Also, the light controls work.

    function render() {
        spotLight.position.x = guiControls.lightX;
        spotLight.position.y = guiControls.lightY;
        spotLight.position.z = guiControls.lightZ;

        scene.traverse(function(child){
            if (child instanceof THREE.SkinnedMesh){

                 child.skeleton.bones[123].rotation.x = guiControls.head_x;
                 child.skeleton.bones[123].rotation.y = guiControls.head_y;

            }
            //Seems to only produce errors
            // else if  (child instanceof THREE.SkeletonHelper){
            //     child.update();
            // }
        });

    }

Please also include a live example if possible. You can start from these templates:

• jsfiddle (latest release branch)
• jsfiddle (dev branch)

Three.js version

• Dev
• r115
• 110 fron cdnjs

Browser

• All of them
• Chrome
• Firefox
• Internet Explorer

OS

• All of them
• Windows
• macOS
• Linux
• Android
• iOS

Hardware Requirements (graphics card, VR Device, …)

Huawei P9 Lite 2017

[rihardse]

Confirmed - working with 200 bones

[Mugen87]

It seems floating point textures are not supported. Depending on the amount of available vertex uniforms, complex skeletons won’t work on your device.

Your model has 556 bones which is noticeable more than the models from the official examples (e.g. the soldier has just 51 bones).

I suggest you use WebGL 2 if possible or simplify our model. In any event, it seems unlikely that this can be fixed on engine level.