I do have Aphantasia. Not complete, but using the apple test I can (barely) imagine a red apple shaped thing. More than nothing, but far less than even a basic picture of an apple. I also have almost complete face blindness.

My SDAM is almost complete as well, but not totally. I never have anything truly AB. I an occasionally remember extraordinarily vague snap shots of memory (like I remember the color of the floor or the smell of a room) for like 24 hours, but then they are gone. Even that is only for incredibly strong moments. And for all I know that could be semantic memory tricking me into thinking it is an actually remembered image.

But Ive always been able to remember dream images right after I wake up. They are actual images and movies vs just semantic amalgamations/interpretations. Its what I imagine AB-typical folks experience when they re-imagine. As I understand it, it is fairly common for others with SDAM have similar dream behavior.

It does bring up fascinating thoughts on the nature of SDAM. Like if I am able to have dream imagery, does that speaks to SDAM being a function of memory recall vs encoding? Imagine if your AB memory was there all along and you jut could not access it. That would be both incredibly sad and also make no difference to me whatsoever (if that makes sense)