Nice! For a real‑time molten flow you’ll want to keep it light. First, use a particle system as the base—each particle holds velocity, temperature and a small radius. Update the velocity with a simplified Navier‑Stokes: ``` v += gravity + viscosity * (neighbors avg – v) + turbulence t += heatFlow * (ambient – t) ``` Clamp the temperature, then use it to drive the color (red‑orange to gold) and the noise‑based heat‑wave distortion in a fragment shader. For the sound, ping each particle’s temperature against a threshold; if it crosses, play a hiss or crackle. If you’re on Unity, the ComputeShader is your friend—do the maths on the GPU and stream back positions. Keep the particle count below a few thousand for 60 fps, maybe split the grid into cells to avoid O(n²) neighbor checks. Don’t forget to add a “solidify” timer so the flow can cool into a solid blob and stick to the forge. Happy coding!