Yes this is the fruit of nonconceptual wisdom. Togal works with appearances that are particularly well-suited to realizing that all is mere illusory display. But then to go one step further and imagine everything is illusory; everything is a big dream, is a big illusion. It is like conceptualizing emptiness. It is one of the most difficult obscurations to fix. Keep that in mind, because no part of rigpa is some thought, "all this is illusion."
I don't want to use my own words to express anything re as far as teachings/understanding is concerned. What you are saying reminds me of something I tried to express many years ago and people did not understand what I was saying, apparently thinking I was trying to say the illusion was inherently real or something, so I steer clear of anything that hasn't been said by one of my teachers.
As Namkhai Norbu has said, everything is ultimately unreal, but we exist in time within a relative dimension and we share a karmic vision which is like a big dream; when you are in a dream, it seems very real and you have experiences and emotions just like regular life, but when you wake up you realize it was just a dream. A dream is an illusion, but we still experience it as real.
Thank you for clarification on togal. I just reread the Four Chogshag today and it's funny how little there is to that book, but some things stuck out for me, anyway. I also remembered what it was like reading this material for the first time (this and other books by ChNN) where he talks about integrating this and that and instant presence and just really a whole lot of stuff that is not actually explained in the text how to do. I suppose that is why I turned to other Dzogchen teachers like Tulku Urgyen Rinpoche etc. to fill in some of the blanks.
"Use what seems like poison as medicine. We can use our personal suffering as the path to compassion for all beings." Pema Chodron