Hi,
I am trying to implement an Ultra Low Cost approximate shadow effect for a car game.
I am planning to attach a small rectangular plane at the bottom of the car, with partial transparency.

Can you please suggest which of the two options is better to implement.
a. On the base rectangular plane, applying a PNG texture with 50% transparency
b. On the rectangular plane applying a jpeg texture but while exporting from 3d Studio Max, setting the plane's opacity at 50%.