It is Pylyshyn who implicitly claims that the spatial extent of a spatial percept is a property of the original object that somehow penetrates into conscious experience without leaving an impression in the physical brain. But Pylyshyn has no need for a "mind-brain barrier" because his mind spills out of his head to make direct sensory contact with the external world, bypassing all of the neurosensory hardware in his brain, just like Descartes' immaterial soul!

We will never have a chance of solving the mind-brain problem if we leave the brain out of the loop of consciousness!

The brain is the organ of consciousness, and it constructs the spatial structure of visual consciousness that we see around us by way of spatial representational entities in the brain. Those representational entities are not composed of some magical mystical "mind stuff" that exists only in a hidden dimension inaccessible to scientific investigation. It is made of physical matter and energy, the ordinary "physical stuff" of which the whole rest of the universe is composed. To claim otherwise is just plain magic!