This is me with my Tibetan Buddhist hat on. I've been working with Green Tara since 1997, blimey, that's about eighteen years! Anyway, it's very difficult to find a good painting of her. It's strange, because you can easily find very beautiful White Tara paintings. And really fierce female yidams such as Vajrayogini are also often awesomely done.
But there's something about Green Tara. I think, hypothesis here, it has to do with the still patriarchal structure of Tibetan monasticism, in which the paintings are done. The painters are male. I think maybe it's easy to paint a really peaceful female Buddha--White Tara is all about healing. And maybe it's easy to paint an obviously really wrathful one such as Vajrayogini.
But a powerful deity who is all about fearlessness and also bestows the siddhis--psychic and all kinds of other types of paranormal power--hmmm....also the fact that Green Tara is weirdly liminal, like she's a little bit outside official Buddhism, some teachers won't give you the transmission for her, and so on. There is this underground Green Tara network, for sure...
It all adds up to a bit of a threat to (axial age, agricultural religion) patriarchy, doesn't it? I'm not casting aspersions on the deities or even on the monks. But it seems intuitive that it would be easy either to paint -- oh dear this is going to come out wrong if you are a Tibetan Buddhist, apologies in advance -- a virgin or a whore, those patriarchal constructs, than to paint a strong female with powers that transcend your institution. Yes?
Sorry, this could sound just awful. I don't mean it to be. I just found the best best best Tara painting, and I've been looking for them for almost 20 years. I have a good one on my wall, the best I could find, from Kathmandu. But this one, wow. I'm talking to the artist and I'll let you know if and when I get a copy.
And...it's a really, really ecological one!