Creating a 3D animation of ice falling into a liquid and liquid pouring into a glass involves several steps in software like Blender. Initially, the ice and liquid would be modeled separately, with attention to detail on their shapes and textures. Physics simulations would then be applied to mimic the behavior of the ice sinking and the liquid filling the glass realistically. This involves setting up particle systems, fluid simulations, and collision physics to achieve the desired effect. Lighting and materials would be adjusted to enhance realism, and finally, the animation would be rendered frame by frame to produce the final result.