Do you believe in free will?

[Perhaps]

You do realize that you are essentially undercutting your own position here? How can your mental reality create the material and conceptual reality and still be dependent on it?

As to your questions: Past our perceptions we have our conceptions. Outside our consciousness, exists everything other than ourselves. The realization that their existence is not affected by and therefore not dependent upon our mind.

The mind creates our reality. In order to make sense of the objective world we conceive our existence as dependent upon the material (brain), but it is the mind which created this idea to begin with. When we are not conscious how do we know - in the truest sense of the word - that things continue to exist? When the mind ceases to exists nothing exists relative to itself; why then would it be different during the existence of the mind?

But let's suppose that things do exist outside of our mind, and continue to do so once our minds cease to exist. It still remains that the reality which was created by the deceased mind no longer exists.

Do you not see understand the difference between the material world and our perception of it? Your brain is not the perception of material world - it is the material world. And the material world does not depend upon our perception of it. We perceive the brain as failing, because the brain is actually failing.

Besides, you are reversing cause and effect here. It would be the cessation of the brain that causes cessation of your mind. A good demonstration of this would be that people in coma, people who are unconscious or people with brain injury lose their perceptual and conceptual awareness - thereby indicating cessation of mind - but their brains continue to function.

Once again, suppose that a conscious being never existed, what then becomes of the material world? It matters not if it exists, let alone the fact that it can't be proven to exist; it is nothing without the mind. In the case of the coma patient, what exists relative to themselves when their mind ceases? - nothing, therefore the mind is the cause of cessation of the brain. Nothing matters outside of ourselves, our reality is completely void until our minds create it.

Wrong. The difference in mechanism of perception would explain the differing perceptions much better. A study of these differences would also explain that the true material world is independent of our perception of it and how well does our perception relate the the true material world.

Under what justification could anyone possibly state that the material world is independent of our perception of it? One must use their perception to even attempt to validate their own argument, which would be self falsified by their own accord. To show that the material world is independent of our minds one must not use their mind, which is nonsense.

No, if you see blue and I see red, then means either one or both of us have something wrong with the mechanism of perception, i.e. our eyes.
The color of an object depends upon the wavelength of light reflected by its surface. The color perceived depends upon our eyes, which, again depends upon the wavelength. If I see red and you see blue, then there is something wrong with atleast one of us. The fact that color-blindness is a known condition is proof of that.

And if everyone has it wrong? What then becomes of your assertion that we do in fact perceive the true material world? I'll say it again, as I have before, we are limited by our perceptions; we are confined within our minds.

What does existence have to do with perception? We can perceive the Halley's comet only once every 76 years - do you think that it stops existing for the other 75? On the other hand, we've never perceived the other side of the moon. Does that mean that the moon doesn't have an other side?

We conceive that it exists the other 75 years, we also conceive that the other side of the moon exists, therefore they both exist within our minds. To exist is simply to be created by the mind, nothing can exist outside of it - or at least nothing which we could ever know to exist.