Translucent knob
grabcad
I tested the KeyShot trial version by rendering a see-through knob model created in FreeCAD using a step file.
Download Model from grabcad
With this file you will be able to print Translucent knob with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Translucent knob.