Today, production companies are being asked to create scenes that are almost impossible to render. To create these impossible shots with speed and quality, the industry has created render passes. In this research project, the aim is to learn and understand the fastest and most efficient methods to create 3D Medical Sciences Visualization. A deeper understanding of Render Passes using Nuke compositing software in an industry based pipeline will answer the above statement. This project was developed in collaboration with the Uppsala Biomedical Center (BMC) and the Special Effects company Oddville. The final animation will also be used for BMC medical conferences. The results revealed that the render passes did allowed for the animation in postproduction and also saved a great deal of time.