Show HN: ParaMetal: 3D Realtime Thermal Analysis SIM

- ParaMetal is a browser-based 3D real-time thermal simulation tool that uses a physics engine (heat equation solver) to visualize how heat spreads across metal objects — no specialized hardware or software required. - Thermal analysis is critical in engineering fields like electronics cooling, mechanical design, and additive manufacturing (3D printing), but traditional tools (ANSYS, COMSOL) are expensive, proprietary, and require powerful workstations. - The project was shared on Hacker News ("Show HN"), a community where makers and developers showcase side projects and early-stage tools for feedback — this implies it's a smaller, independent effort, not a commercial product yet. - It demonstrates a convergence of WebGPU / WebGL (3D graphics in the browser), real-time physics computation, and accessible simulation — a trend toward bringing complex engineering tools to the web.