Reality and perceiver: listener question

1. Can we revisit the "real world" bit as in where information about reality stops and imagination begins and vice versa. 

2. I noticed in a recent call you said "isn't it interesting how reality can shift so dramatically from one moment to the next?"

The speaker had been commenting about what I have noticed as well, that for example in the morning there will be "bad" feelings about a specific situation, and then in the afternoon it somehow looks different although nothing about the situation has changed. I have called this the perceptual lens changing. But you call it reality. Is that because there is no doer choosing to have one specific lens or another? Or is it because all reality is subjective? Or both? And this is also why non-dual teachers say everything is an illusion at the far end of this discussion?