Oval Race Track: Blender 3D Game Engine
1. Add either a Bezier Circle or a NURBS Circle.
Top View. Object Mode
Spacebar >> Add >> Curve >> Bezier Circle
User Preference menu >> Add >> Curve >> Bezier Circle
2. Change the Circle from 2D to 3D.
By default, the Bezier Circle and NURBS Circle are added as a 2D object.
To use it as a path for our oval track, we need it to convert it to 3D object
Bezier Circle selected. Edit or Object Mode
Buttons Window menu >> Panels >> Editing (F9)
Curve and Surface tab >> 3D button
3. Scale the circle to the size you want your oval track to be.
For this tutorial, I'm only scaling it a factor of 9.
Bezier Circle selected. Edit Mode
Scale by a factor of 9.
3D View menu >> Mesh >> Transform >> Scale