
Good to know, re: hypnagogia. I’ve occasionally tried experimenting with it when I think to, while floating near sleep. I’ve weirdly found that moving my eyes certain ways, or focusing my eyes to certain distances, while I’m near sleep (eyes closed) can make it feel very suddenly like I can see something. My intent was to find what seemed to work in that state and see if I could use such techniques while more awake, but if you’re right, then that presumably won’t be as successful as I’d hoped.
I have the same problem losing both the temporary hypnagogic visualization and lucid dreams, rare as the latter even are for me: it’s so easy to do something silly, like pay too much attention to it or get excited about it, and BAM, it’s been destroyed.
I did have one occasion where the hypnagogic thing had mild success when I tried to imagine something non-stationary, in this case sort of watching landscape go by as if I were in a car watching it through gaps between concrete pillars in a bridge railing.