Do you mean a refresh option that if it's set the ramp is refreshed every frame until you set it back to 0? And what kind of refresh should that be? Alpha ramps are drawn every frame,
I don't know if I understood everything as I'm not a table author so I don't know all your funky tricks 
If you look at an Alpha Plunger you'll see that done with a Alpha ramp and a black light refreshment (R,G,B 0,0,0) put on the ramp and the same shape of the ramp.
The black light is used to refresh every step of the plunger.
With a horizontal ramp, the black light has the same shape of the ramp, with an inclined ramp the black light must be stretched upward to refresh the whole ramp.
JP means if the ramp will auto refreshes itself every time it changes the image via scrip, also avoids having the black light.
Thanks
Max
Edit : Without the light of refreshment, the images of the steps of the plunger would remain one above the other.
Edited by kiwi, 15 June 2013 - 05:15 PM.