Noticed blending issues (see the yellow areas on the image below) with Ubuntu + FireFox. This could be related to `premultipliedAlpha: true` instead of `false`. See `gl-plot3d` at https://github.com/gl-vis/gl-plot3d/blob/ccfc4318ec9d382900f7b80b17b1630092fe3953/scene.js#L84. 