If heaven is a true paradise, I'm sure that people can appear to you however you want them to.
But here's a thought I'm having: The processing of faces is a function of the brain -- there are people who cannot perceive faces at all. For that matter, some people can't see anything. It seems to me that "seeing" is more a function of our bodies than of souls. Hence, it would make sense to me that if heaven were to exist, it would involve contact with people in a qualitatively different way than on Earth -- something we within our current physical restraints probably cannot comprehend.
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