Passive radiative cooling is an emerging technology that could partially reduce building heat loads. Much effort is aimed at enhancing the surface radiative emission within the atmospheric window by way of finding molecular structures capable of high reflectivity and high emissivity. In this study though, the possibility of a geometry optimization for an increase of radiative heat transfer is explored with theoretical and ANSYS heat transfer simulations. Several studies discuss the increased radiative heat transfer by optimization of nanostructures, namely biomimetic triangular shaped hair-type structures. These results show enhancements to radiative transfer, but do not support the findings with extensive theoretical justification for the conclusions. In this paper, nanostructure correlation to radiative transfer is discussed along with theoretical justification for the correlation. Classical radiative transfer analysis methods are applied on a large-scale to understand the possibility of these structures’ shapes causing a change in radiative transfer. These classical analysis methods will be verified with ANSYS simulation of the studied structures. Largely, this involves geometric changes intended to reduce the percent of self-absorption by tightly packed triangular structures. While the surface area for surface radiative transfer increases, so to does the surface area emitting directly to another radiative transfer surface. This effect is intended to be reduced by variation of geometric parameters. This study will explore the possibilities of applying these lessons learned from nanostructure radiative transfer enhancements to large-scale applications that can be used within industries for various thermal management applications.