Figure 19.25b Two half columns without a visible seam. Compare with Figure 19.25a.
19fig25b.wrl	Click on the image to view the VRML scene.

#VRML V2.0 utf8
# The VRML 2.0 Sourcebook
# Copyright (c) 1997
# Andrea L. Ames, David R. Nadeau, and John L. Moreland
Group {
    children [
        Transform {
            rotation 0.0 1.0 0.0  1.570795
            children DEF halfCol Inline { url "colsmth.wrl" }
        },
        Transform {
            rotation 0.0 1.0 0.0  -1.570795
            children USE halfCol
        }
    ]
}