Kant illusion

At one point, Kant goes into depth about illusions. Like all ideas, they originate from our minds and only our minds. If we witness something with our own eyes or visualize something someone tells us, we have our own images, kind of like a built in copyright. Noone could ever have the same interpretation. Illusions are these ideas in our own minds. He mentions time and space, space is the volume and capacity of our minds and ideas? how shallow or deep the thought is? how would you measure the shallowness of a thought though? and on what basis? Time could be the amount of time to put synthetic ideas together to formulate your...illusion. pretty cool if you ask me.