Human conscious experience is not only rich in qualities, but also rich in structure. For example visual experience appears to have a structure that corresponds to the spatial environment being experienced, and experience as a whole comes carved up into distinct sensory modalities. The structure of our experience seems very different from the structure of the brain, at either the micro or the macro level. For the dualist this is of course not a worry, as the conscious mind is a completely distinct entity from the brain. However, many panpsychists believe that the conscious mind is identical with, or bears a very intimate relationship with, the brain. Most Russellian monists, for example, believe that the conscious mind is the intrinsic nature of the brain. And all constitutive micropsychists think that human experience is grounded in the properties of micro-level entities. Thus, these forms of panpsychism face the challenge of explaining how the rich structure of consciousness results from, or at least co-exists with, the seemingly very different structure of the brain. Perhaps the most discussed form of the structural mismatch problem is the grain problem (Maxwell 1979; Lockwood 1993): the worry that experiences seem to be smooth and continuous in a way that is at odds with the discrete, particularized structure of brain properties.