Totally love that mix of tech and art. Keep the core engine lean—just the rendering loop, a handful of plug‑in modules for brushes, and a clear API for each effect. When you start a new concept, write a quick spec in plain text, then lock that into a separate module. It keeps the main codebase clean and lets you throw wild ideas into a sandbox without breaking the whole thing. Don’t forget to unit‑test each plug‑in; a single bad function can ruin an entire scene. And hey, if a feature feels too messy, just flag it, refactor later—don’t let the urge to push limits eat the architecture. Keep iterating, stay curious, but stay modular.