A casting method, cast article and casting system are disclosed. The casting method includes providing a base material in a mold, directing a fluid material into the mold, and solidifying the base material and the fluid material to form a cast article. The base material has a first density and first composition. The fluid material has a second density and a second composition. The first density differs from the second density, the first composition differs from the second composition, or the first density differs from the second density and the first composition differs from the second composition. The cast article includes a first material solidification from the base material, and a second material solidification from the fluid material. The casting system includes a mold for containing a base material and an input configuration, with flow control feature, for directing a fluid material into the mold containing the base material.