Elasticity = the coefficient for the vertical speed after the rebound
Friction = the coefficient for the horizontal speed after the rebound (ie: actually, this is "1.0f - Friction" for people who care about physics
SkidAngleRatioBase & MaxSkidAngleRatio = determine when the ball rolls or skids during the rebound
Grass = tell if this court is made of grass or not ; the grass has the special ability to "absorb" the spin effect, thus the topspin & slice will have less effect on the rebound direction & height
The settings by Brad1981 are not realistic when looking only at the physics of the court. If the result is more realistic in game, it means something is wrong with the air resistance... (on which I have some doubts, coz sometimes, I feel it's a bit too strong on low ball speed...