turbowrap makes this demo a lot faster. https://turbowarp.org/893170547?fps=60&hqpen c and b adjusts the colour and brightness of the pen respectively. r adjusts the number of rays. I recommend 160 rays, because full 360 is really laggy, even on turbowrap
What is this? It's a weird thing I did when developing a cheap fill tool.z This ray casts many rays visualised as pen drawings for light visualisation. So this is like RTX but way more simple.