Realistic Icons share the perspective, light source & palette of the Rich Icons.Their representation is not stylistically restricted by structural constraints.The primary goal is to provide a realistic representation of the metaphor that is true to the material attributes of the object that is being rendered.

Flat design is a style of interface design emphasizing minimum use of stylistic elements that give the illusion of three dimensions (such as the use of drop shadows, gradients or textures) and is focused on a minimalist use of simple elements, typography and flat colors.