CM

Using code adapted from [Draw Line Set](http://www.open3d.org/docs/latest/tutorial/visualization/visualization.html#Draw-line-set), it looks like the coordinate system is RH y UP, which matches OpenGL, etc. ```py def generate_axes(scale: float) -> List[o3d.geometry.LineSet]: points = [...

I'm also confused because the normals in this "F" synthetic point cloud are all `0, 1, 0`, which should point along the positive Y (green axis). `-1.624193 0.000000 -1.892043 0.000000...

Okay, I think this is right, and maybe helpful to someone else: 1. Coordinate system is right handed (RH), x RIGHT, y UP, (thus z BACKWARDS), which matches OpenGL 2....

Verified the output `.obj` file is consistent with OpenGL coordinate system. Importing into blender with * -Z forward * Y up gives the correct orientation of the test F mesh....