This paper investigates the response of epsilon-near-zero (ENZ) metamaterials and plasmonic materials to electromagnetic source excitation, focusing on their potential to tailor the phase of radiation patterns. The authors explore both analytical and numerical methods to study the behavior of these materials in canonical geometries, such as planar layers, cylindrical shells, and more complex shapes. They demonstrate that ENZ materials can isolate two regions of space and modify the phase pattern in one region independently of the excitation shape in the other. The paper provides physical insights into the phenomenon and discusses potential applications in imaging and radiative tools at infrared and optical frequencies. Key findings include the ability of ENZ materials to act as angular filters, modify phase fronts, and isolate regions from external phase variations. The authors also present numerical simulations to validate their theoretical predictions and show the generality of the concepts through complex-shaped ENZ obstacles.This paper investigates the response of epsilon-near-zero (ENZ) metamaterials and plasmonic materials to electromagnetic source excitation, focusing on their potential to tailor the phase of radiation patterns. The authors explore both analytical and numerical methods to study the behavior of these materials in canonical geometries, such as planar layers, cylindrical shells, and more complex shapes. They demonstrate that ENZ materials can isolate two regions of space and modify the phase pattern in one region independently of the excitation shape in the other. The paper provides physical insights into the phenomenon and discusses potential applications in imaging and radiative tools at infrared and optical frequencies. Key findings include the ability of ENZ materials to act as angular filters, modify phase fronts, and isolate regions from external phase variations. The authors also present numerical simulations to validate their theoretical predictions and show the generality of the concepts through complex-shaped ENZ obstacles.