how to render in unigraphics nx 6
Start - Shape Studio
View - Visualization - True Studio Task
Materials Library on the left panel, select body and right click the material and "Apply to Selection".
To render, Image - High Quality Image. I prefer Ray Traced/FFA myself but that can be quite time consuming so use for example "preview" or "photo realistic" to check that the render is approximately what you are after and do the final render with "ray traced/ffa".