Hi Edgar, yes, this seems to be an error in the function. Thanks for reporting it! I hardly needed those plot options so I probably forgot to care for them when adding anisotropy. Regarding your earlier question, I suppose that this should be ok.
I'll see if I can make a update in the next couple of days. Unfortunately, my time to support these functions at the moment is quite scarce...
When types "cloud1" and "cloud2" are used in combination with anisotropy, the function does not return an array (a column for each theta tested). I'm guessing this is an error in the function?