| #declare NewTop =
| difference {
| object {TableTop}
| cone {<0,0,-0.25>, 0.5 <0,0,0.5>, 0 translate <-2,0,1> texture
You need to put the cone *before* the height_field. The way differences
work is that the first object is the thing from which all else is
subtracted.
H.E. Day