Hello, I have a very simple bit of code that takes 3 yt fields and outputs a mayavi field. I also have a version for a scalar field. See: https://github.com/SWAT-Sheffield/pysac/blob/master/pysac%2Fanalysis%2Ftube3D%2Fprocess_utils.py#L67 for the implementation. Would this be something worth submitting to yt? If so where should I put it? Stuart