I believe that Schopenhauer is the closest to describing true reality - at least as far as I have currently developed my thoughts. But if reality-in-itself is pure Will (or what you might call an immaterial realm of thought), and it presents itself as the material world (Representation), why should it represent itself this way? To me, this does not solve or address the hard problem of consciousness.
Would Schopenhauer say that the way our brains function is merely correlated to our Will? In other words, I feel happy, and my brain corresponds by firing synapses and releasing chemicals that, from a material view, represent happiness? If that is what he is saying, why should it appear that way? How and why does this representation form?
I do not see how transcendental idealism solves or avoids the hard problem of consciousness.