I'm wondering about how to add a reinforcing rib to a stl model with Blender. I have a shape like the one in the picture below and I'd like to add a rib that perfectly match with the inner surface which is curve.
In a CAD modeler such as Inventor there is the possibility to extrude a sketch to a face, but no idea about how to do it in Blender.
I'm able to add a cube and resize it to the approximate shape of the rib, but how to make its border to match with the inner surface of the original stl?
Thanks in advance for help!