Partial transparency in viewport (cycles)? Is there a way to display partial transparency in the 3d view in cycles while modeling? 

Related: Partial transparency on object?

The method above looks like it only works in rendered view in the viewport which isn't very compatible when modeling. Is there another way to have transparency in the 3d view?
Try to unselect "Limit selection to visible" in the 3D View header bar.
This works only in edit mode on the selected object...
I don't know if it's enough for your purpose.