The grid that is rendered in editor together with the snapping option works in world units in the three axis (X,Y,Z). And the grid is rendered in both perspective and orthographic cameras.
Can you share some example on what kind of grid are you looking for?
I couldn’t find any examples created in a different 3D perspective space.
So, I referred to sites like https://planner5d.com/ for inspiration.
Do you have any simple examples available?