[arien]

Perhaps this whole visualisation process is related to hallucinations. Do people with aphantasia ever experience these?

[NeedMoreTea]

When I had my couple of acid experiments a few decades ago, yes, I saw hallucinations just fine.

This opens an interesting can of worms. :)

[coldtea]

Yes, but hallucinations can be visual artifacts (imposed on our live view through our eyes).

Whereas aphantasia concerns visual representation inside the mind alone.