Shader compilation issue on devices without extStandardDerivatives

[mvaligursky]

Repro:

• disable extStandardDerivatives in WebglGraphicsDevice by commenting out line //this.extStandardDerivatives = true;
• run engine example: render-asset

The problem is missing varying vObjectSpaceUpW; in the fragment shader.
builtinVaryings in lit-shader.js has that in the list, but those are only added to vertex shader, but not to fragment.

[GSterbrant]

Do you have an example device to test this on?

[mvaligursky]

I do not, I only simulated one by disabling the extension.