Greeble or "nurnies" are widely used to adding small details to 3D models, especially in Science Fiction genre. This Houdini tool is inspired by Tom Hudson's famous 3ds max plugin:
https://max.klanky.com/plugins.htm
I have developed a method for additional placement of shapes on the sides of the panels
Render Only toggle was very useful because of low video card performance and/or long geometry computation
It was many experiments in R&D stage, until the results are achieved... :)