Peter Verswyvelen

Sorry, I forgot about this issue. What happens if you load and expert the transparent scenes from [this folder](https://github.com/iimachines/Maya2glTF/tree/main/maya/scenes)?

Hard to tell just looking at the output. Can you share your Maya scene with me?

That's because glTF really is an export-only format. It would be rather hard to reconstruct the original scene from a GPU optimized rendering format like glTF. It is not impossible,...

Currently the opacity map is the alpha channel of the base color, as the glTF spec dictates. Adding an opacity channel is certainly possible, but then it must be merged...

Cool stuff! Okay, you conviced me, a transparency channel will be added. Unfortunately you will still need to set the technique to transparent for getting correct rendering though.

Besides potential wrong depth sorting of faces in the viewport, not really.

I did some experiments, but Maya seems to pass wrong alpha values. For example, in the attached PNG, Maya makes the pixels around the circle opaque, while the blue ones...

`GL_ARB_texture_query_levels` is supported on very old hardware, so that is odd... What hardware do you have? What is selected in the preferences for `Rendering Engine`? 

Since I don't have a recent Mac it is very hard for me to find out what is going on unfortunately. This project desperately needs Mac developers 😉

You could try putting the viewport rendering engine on something else, like OpenGL Legacy, and see what happens. I find it weird that you GPU doesn't support the required extension,...