I'm painting a mural of a few really large letters. It will be in a long, narrow hallway, so people will be viewing it largely from an angle.
I'm planning on drawing them expanded so that they can be sort of legible from the other end of the hallway and still being legible close-up, but I'm having trouble deciding on the degree of expansion. It's easy to calculate how the image that a camera would take would be stretched and shrunk, but our eyes compensate for much of that.
I'm going to try a few different degrees of expansion and see how they fare, but I'm wondering if there's any sort of rule of thumb for this or where I would look for precedents.