You can set the square color individually. The WallGeometry does not have a bottom so you don’t have to worry about that. You can change the height of the square corresponding to the height of the wall geometry.
You can add a label entity on top of the square geometry with a height slightly above it.
Several issues are summarized as follows：
1.version 1.71, Wall cannot close, v1.77 is ok.
2.if lable position is set dynamic value by SampledPositionProperty, lable always in the center of the polygon. I want the label on the polygon.
I confused why pixeloffset param is no use. cannot set relative position to polygon.
I use wall+polygon+label combine a box, barely achieved results，may be somebody can give me better solution. and hopfully, may some expert can give a demo of SampledProperty.addsamplespackedarray etc. sandbox lack of these demo.
if use Polygon extruded as Box, the StripeMaterial oritentation will wrong, whether horizontal or vertical, oritentation always horizontal.