Hey, I've been having fun messing with formulas, and I think I've come up with a challenge to encourage those of you who haven't messed with formulas to get your feet wet. From the Assembly room, Insert a Formula. Double click on it to go to the modeling. Erase the formula that's there, and replace it with: x=10u; y=10v; z=1; Click on the Parse button. The result will be a 10x10 plane floating 1 unit above the z-axis. Here's the challenge: Change the z line to make the resulting shape more interesting. Hint: z can be a function of u and/or v, and, since they're already defined, y and/or x.