Support for Sprite

Thanks for your great work, could you add support for sprite for visulization of pure 2D image, as discussed here:
https://stackoverflow.com/questions/36668836/threejs-displaying-a-2d-image

Depending on the application billboards might be the more applicable. In three.js they seem rather straight forward: https://threejs.org/manual/#en/billboards.

MRs and other resources relevant to its implementation:

I would propose using billboards (cleaner and better readable). These MRs tackle their integration:

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