Plastic materials have both viscous and elastic properties. It is difficult to accurately describe the property variations during the molding process when using classical fluid mechanics or classical elastic mechanics. To realize the effects of these material properties on product quality or structure, designers need a professional simulation tool to predict the filling patterns using different plastic materials upfront. Moldex3D Viscoelasticity helps users visualize polymer variations over time in the cavity; furthermore, it can be integrated with Warp or Optics modules to provide advanced analyses.