I’m trying to engrave rifling on an artillery projectile such as this one :
There is « ribs » on the exterior surface similar to a barrel rifling.
So far so good I managed to make the basic shape of the projectile using a reference photo and the follow me tool :
For the rifling, I’m trying to cut through with the substract tool, using a rectangular « cookie cutter » but it is not very precise and time consuming.
Do you have tips to use a more efficient method ?