When you create a parametric model in FreeCAD. The model will look very bland. You can add different colors to your 3d model face and you can even make your model transparent to help view the underneath wireframes.
But when you have to present the work to a more general audience you can’t really show a dull-colored 3D object. You need to have the 3D model in some rendering environment which will add colors, shadows, lights, a camera, etc.
As you can see in the above image it is not very pleasing to look at. It will not look very good on a website or printed in a pamphlet.
So we export the 3d model from the FreeCAD to a .stl file.
That STL file will be imported into the blender software.
There in the blender environment, we can add different lights, cameras, colors, and textures to make it look more pleasing to view and create a nice scene.
As you can see these images are more presentable to a wider audience.
Download Links
Blender from https://www.blender.org/download/
FreeCAD from https://www.freecadweb.org/downloads.php
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