- DNA-origami is being explored as a scaffold for 30–40 nm voxel-scale 3-D construction of arbitrary crystalline optical components, enabling custom optical filters and potentially optical computers.  
- Participants debated whether thin DNA shells are too floppy for practical circuits and suggested instead self-assembling tiles that embed inorganic circuit elements.  
- A 5-axis 3-D printing path-planner is under active development (juri_) using projective geometric algebra in Haskell to lay non-planar, plywood-like fiber-reinforced layers with controlled grain orientation.  
- The planner aims to treat CAD models as tensor fields, automatically orienting continuous fibers to match load paths, and could be paired with robot-arm printers that build aerial support scaffolding.  
- fenn requested an easy-to-use Blender plugin for topology optimization that respects 3-D printer overhang limits as a near-term tool.  
- Optical meta-surface research (linked 2020 Optica paper on volumetric meta-optics) was cited as directly relevant to voxel-scale optical functions and miniaturized camera filters.  
- Discussion of motor-position feedback included trade-offs among optical encoders, magnetic encoders, Hall-effect sensors, and differential SPI to mitigate electromagnetic noise near brushless motors.  
- Eric Drexler contacted lsneff about the DNA-origami CAD work, highlighting ongoing interest from foundational nanotechnology figures.  
- kanzure emphasized documenting negative results—i.e., why certain nanotech CAD approaches may fail to reach manufacturing—as valuable scholarly output.