A working notebook
Field Notes
Observations made while building, debugging, testing, and trying to understand what the system is actually doing.
Format
Short observations, build logs, useful edge cases, and occasional deeper reports.
Sources
First-party notes and clearly labeled local archive copies, with links back to the original when one exists.
Maintained by
Eric Rhea
Current issue
Latest from the notebook
The most recent entries are shown by their documented publication date. No freshness labels are inferred from file changes.
AgentLab: Aerospace Engines
Four iterations show what improved, what stayed strange, and how an agent-driven Blender render became an animated engine explainer.
Wet archway
A generated stone arch meets a very enthusiastic water simulation.
Engines and stone
A panoramic gallery catches the project moving from turbine diagrams to a stone arch.
Codex + Blender: turbine-engine first take
A public visual receipt from an agentic mechanical-modeling pass, preserved with its supporting image.
The Helios Array documentary
A model-led documentary experiment with enough source material to inspect the result.
Advisory Hour, kept in context
Browse the complete new archive by writing, projects, research trails, and competition season.
Reading paths
Follow a thread instead of a chronology.
Worlds and simulations
John’s World, City Explorer, continuity, generated media, and browser-scale environments.
02Models, agents, and tools
Local inference, model runtimes, agent workflows, prompt systems, and debugging surfaces.
03Playable systems
Game loops, simulation mechanics, small interactions, and builds that reveal their design under play.
04Craft and judgment
Voice, attention, vocabulary, decision context, and the human practice around technical work.
Complete index
Every field note
The index stays deliberately plain: title, documented date, and the thread it belongs to.