The last two nights was quite the cognition-circus for me. Saw lots of vivid and incredibly complex patterns and weird technology/constructs. Nothing I could make any sense of and all very fleeting, kind of hard to make out. Best comparison, but not relatable for everyone, would be when you set the gamma-level in games, and it tells you to lower it until you can only barely still see x (for example a dragon or a picture of something, it tells you to lower until it's almost all black). It's like someone forgot to turn the lights for the cognition on, it's so dark I can only barely see. This was not during sleep or half-sleep.
I noticed that I seem to get this specific vivid cognition when I am sleeping at places that are not home, so without all the special protection.
Also I noticed very long ago already, that there seem to be many different types of visual cognition. One type, that seems to be most difficult to achieve, is having the cognition literally on my "3d-screen/interface". There is usually something going on here, but always very little (puddles forming and dissolving, straight lines visible for short moments, fine grid pattern visible for short moments). The few times I had clear cognition with this were in half sleep or when going into the bathroom after waking up at 4am. The seemingly most common/working cognition is when I try to concentrate on the first one mentioned, it transitions to this cognition that is more like a mental image, and it transitions without me even noticing. I think this image is more in the top right and feels much less "direct" than the first one, I don't see this one with my eyes. I think this may also be the one I see/use in dreams.
The third one is more direct, similar to the first one mentioned, but it feels like a second layer on top of my direct vision, like transparent paper with visuals on it. This is the one I have these vivid cognitions that I described in the beginning of the post with. I may have forgotten something, but I don't think so.