Part 1 of reality
A lifeform has for contact with the 'outside', simply said, a set of sensors and actuators. These need to be processed in such a way that the lifeform stays alive. This processing is done by a central or distributed brain. This brain needs to have some sort of representation of the 'outside' (reality,nature). It does this through its sensors and internally some model has been built. This model is what I call the functional representation of reality (reality='outside'). Since there are many energy-related contraints, this model must just represent those parts of reality that are 1) possible with its sensor scope, and 2) has mimimalised complexity and energyexpenditure, resources. So it is necessary that this 'model' has a minimal implementation, just enough to succesfully interact with reality, the 'outside', and stay alive.
Therefore I call it the necessarily minimal implemented functional representation of reality.
Part 2 of reality
A model never has a complete representation of reality, which is impossible. If it encounters situations outside its model, its understanding of outside, it can be fooled. I see pattern recognition fail often when the model, the worldview of the brain, tries to make sense of the situation 'outside' with not enough information. For example when I wear a T-shirt with a coloured symmetric print, some flying insects wrongfully interpret it as something else, a flower maybe. In unpoilt nature these situations hardly ever occur so this fly has a complete enough model to fulfil all of its life functions and it correctly reacts to all familiar situations of the past 100my.
Human pattern recognition also has these flaws. We see human faces in animals which is clearly stupid and wrong. We see all kinds of patterns that aren't there. For example when we try to understand the behaviour of another animal we tend to project our human ways, to try to understand it in our model. It is extremely hard to objectively observe. You have to be aware of all the errors of observance outside of the perception/interpretation of your model in your brain. To be aware of the very small model humans have of outside, of reality.
Part 3 of reality
So there is an enormous amount of things happening that you're not aware of. Behaviour of other life and missing colours, slow/fast rate of change, vibrations, SMELL and sounds outside of the scope of our human sensors.
Therefore from a human perspective to find reality is to first dress our culture down from its 'bubbles', retrace civilisation's steps, until only the natural things remain. It takes a lot of effort to change your direct interpretation. Then you must find all the natural errors of your brain, the inconsistencies with natural thinking and its unawareness of many things because its model is a necessarily minimal implementated functional representation of reality. It is important to be aware of all the information-lacking shared 'bubbles' you are in. That awareness has to be integrated in your direct interpretation. Then you've found human reality.
edit: theory by nanning