These files are provided for GCI participants to create suitable
derivatives of the BRL-CAD logo using BRL-CAD itself to represent and
render the logo.

Provided is a logo.g file that includes the 3D model.

This 3D geometry file may be opened with mged or archer and may be
rendered through a variety of means including commands like rt,
rtedge, and rtwizard.

Also provided are example high-resolution renderings that were made
into stickers.

Desire is to have a version of the 3D model that has a center pin that
is "balanced" and/or otherwise is proportionate with a real chain.

Searching on bike chain link can provide lots of visual aids:
https://www.google.com/search?q=bike+chain+link&tbm=isch

Making the pin have a diameter half of the plate diameter is probably
sufficient.  After the model is fixed, colors and shader options may
be adjusted, and a high-resolution rendering can be made.

Some helpful rendering options to rt are to turn on ambient occlusion:

rt -c "set ambSlow=1" -c "set ambSamples=256" ...

or to turn up/down the amount of ambient lighting:

rt -A1.2 ...

or to render with jittering, hypersampling, and big:

rt -H16 -s2048 ...

Which options you ultimately end up using depends on far too many
details than can be itemized reasonably here.  Play with it and try
some low-resolution renderings until you're happy with the preview,
and then turn on all the high-quality options for a final rendering.