I'm out of my depth here, and more or less guessed which subgroup in Tibetan Buddhism would be best to post this question. Please feel free to refer me elsewhere if this question is inappropriate here.
My confusion concerns visualisation of deities or Buddhas.
Some sources indicate that the visualisation is a sort of temporary externalization of one's own Buddha Nature, which ceases once that Nature has been realized.
But other sources indicate that the content of the visualisation corresponds to an actual external reality, so that even after the aspirant realizes his/her Nature, the visualisation's object remains a real, external "cosmic" or "transendental" Existence.
Thanks in advance for any comments that might enlighten my limited understanding