How to draw edges on top of triangles

[drews]

Over in the COLLADA forum I’m trying to create a similar wireframe. It appears that my frame has to be built separately from the surfaces. This OpenGL discussion is helpful - if anyone has any further ideas, please let me know.

Set line width in COLLADA for viewing in Google Earth

Here is the KML experiment showing a pyrocumulus plume of smoke from the Williams Flats Fire in August 2019. The green (and nested yellow) isosurfaces are created with COLLADA 3D models and rendered in Google Earth. The gridded cage (wireframe) around the isosurfaces is built in KML with LineStrings of width=1 pixel. The purpose of the white grid lines is to bring out the 3D contours better. The grid cage does not line up accurately with the edges of the COLLADA triangles; see upper left, below…