Absolutely No Pen, which means that if you have a project that already has a pen part, this won't interfere with it! Optimized for speed S2=200 is the limit on making it not laggy. Use with credit. If it starts lagging too much, try toggling large area?. Original Non-Pen light engine: https://scratch.mit.edu/projects/1193851596/ Other light engine projects: https://scratch.mit.edu/projects/1107213320/ https://scratch.mit.edu/projects/1097320798/