I have questions in regards of drawing 3D printing model. As the picture shows, I try to illustrate the 3D printing process through Solidworks drawing. However, I encounter difficulties while I tried to put polymer component into nozzle. Even though I successfully colored the polymer part, it still can't show up correct color for polymer part lies within the nozzle. How I suppose to properly color interior part of an object? Currently, I extrude the nozzle then perform another extrusion to form the polymer filament. Thank you for all the input in advance.