[PostGIS] #6105: many of the static image examples in the docs are gone

[PostGIS]

#6105: many of the static image examples in the docs are gone
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  Reporter:  robe           |      Owner:  robe
      Type:  defect         |     Status:  new
  Priority:  medium         |  Milestone:  PostGIS 3.7.0
 Component:  documentation  |    Version:  master
Resolution:                 |   Keywords:
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Comment (by robe):

 this one -  https://postgis.net/docs/manual-3.6/en/ST_AsX3D.html  vs.
 https://postgis.net/docs/manual-dev/en/ST_AsX3D.html  you can't see the
 diffuse coloring anymore

 the diffuse coloring feature that X3D provides is lost.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6105#comment:2>
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