Thread: Ray Casting - Skybox

What engine? Which ray caster? Are we talking full ray tracing like POVRay? Faux-casting in something like UDK? Using the new RTX libraries in DirectX?

Is this even a JavaScript question? (not aware of any ray tracers in JS)

Oh wait, are you BUILDING a ray-casting engine? IF so the approach I suggest for a skybox is to simply map it directly to heading. For example if you have a 16:9 view of 90 degrees FOV at 1920px wide, your skybox image ideally would be four times that wide. Treat the height of the image as a direct map to 0..90 degrees on yaw, and the width of the image as a 1:1 to heading. It's the simplest and fastest approach though not 100% real world accurate, it's "good enough" for most games and even simple animations.