You have two options on this:
- use a ball-nosed endmill with a sufficient radius to cut this (looks like you’d need a 1/2" or larger)
- model it in 3D using the new Pro modeling features
For the latter I have a tutorial for a similar shape which addresses this sort of thing at:
In CC406 Carbide Create adds the option of 3D features in a new “Pro” license. Currently available as an open beta for testing at: Carbide Create CAD/CAM Software for CNC Routers (see: Carbide Create 400 for the initial announcement and consider checking out a beta if available)
To activate the features see: https://www.youtube.com/watch?v=9dMVzLTbego
and https://launch.carbide3d.com — creating an account will allow a free trial. “This trial is fully functional … so you can generate G-Code and try a full project.”
See: Carbide Create Pro - First Look for some more details.
A video tutorial at: Starting with 2.5 d carving and see Vcarve pro wide flutes for a decorative 3D design.
Pricing discussion for the “Pro” license (the base functionality will remain free): Carbide Create Pro- What do you want to see? - #73 by robgrz