Use WASDEQ to move and arrow keys to look around in modes 1 and 2. Press "Space" to add a keyframe in mode 2. Press "G" to play your animation in mode 3. Press "R" to set the resolution to 0.5 (for turbowarp). Enjoy! With the keyframe system, you can actually create your own little 3D fractal animations. By recording the animation on a video platform and speeding it up (Scratch is slow), I got some pretty neat videos!
Thank you to @TheRealAL2009 for their guide to raymarching! It was very helpful in making the raymarching engine. Everything else by me. Use turbowarp: https://turbowarp.org/1388350369?hqpen TurboWarp is a Scratch mod that compiles projects to JavaScript to make them run really fast.