You have a variable Z_polygon offset, no z-fighting.
I suggest getting it too, it works great, and is fast on my p-800 even casting shadows from 3 1000 poly+animated models+seperate guns casting shadow, all onto a full map..full game running too, and still runs at a playable rate.
plus for your situration it has static texture shadow casters(or something like that)..you can give it that oval thing in a texture map and it casts that.
I suggest getting it too, it works great, and is fast on my p-800 even casting shadows from 3 1000 poly+animated models+seperate guns casting shadow, all onto a full map..full game running too, and still runs at a playable rate.
plus for your situration it has static texture shadow casters(or something like that)..you can give it that oval thing in a texture map and it casts that.