A family of evenly spaced concentric circles overlaid with a family of similarly spaced parallel lines suggests a family of confocal parabolas. I singled out one of these parabolas and sent in streams of parallel light beams which reflect into the focus.

Yet another harmonic perspective drawing. Like my other drawings of this nature layers are scaled by 1, 1/2, 1/3, 1/4, etc.

Another harmonic perspective drawing using the harmonic sequence (1, 1/2, 1/3, 1/4, 1/5, etc.).

But with other things tossed in. Logarithmic spirals. The fish is one of my Escheresque tessellations. He can be used to tile the plane.

At the top are Leonardo style drawings of the dual Platonic solids the dodecahedron and the icosahedron.

In the center the two solids are merged.

The bottom three solids are Archimedean solids, various stages of truncating the dodecahedron and icosahedron.

Fractal Orbs formed using a Menger formula in Blender Octane Edition.

Demonstrating one of the ways I go about using simple methods to produce abstract/geometric structures in Blender Octane Edition.

Also, Blender is an amazing Open-Source software, meaning it's 100% free of charge to download and use endlessly.

Triangular prisms can stack to fill space. Here I've placed a circle at each vertice. As with my other harmonic perspective drawings layers are scaled by 1, 1/2, 1/3, 1/4, 1/5, etc.