checkTransparency issue

[PrincessGod]

Should checkTransparency parameter be in ambientTextureOptions?
Cause I have obj with transparency ambient texture.

[lilleyse]

I'm pretty sure most glTF 2 renderers will ignore the alpha channel for anything but base color. For example: https://github.com/KhronosGroup/glTF-WebGL-PBR/blob/master/shaders/pbr-frag.glsl#L293.

It would be better to transfer the alpha channel to the base color (diffuse) texture instead.

[PrincessGod]

@lilleyse Thanks, That's let me learn a lot.
But in this code, if a .png file load for ambientTexture first, and when deffuseTexture use it, it will lose alpha data. Because you just load image once.

[lilleyse]

Ah that is true. I'll open a PR to change the load order.