For the 2nd image, look into Volumetric Lighting.
Here’s a few topics to start off with:
Volumetric Lighting in REALTIME with beams! (this one has an uncopylocked source)
Volumetric Light Effect
https://www.youtube.com/watch?v=Y3UJFK0s6Dg (not updating)
However, all volumetric lighting plugins and techniques for Roblox right now appear to be really performance heavy and not ideal, so I’m not sure if it’s worth the attempt, but you can still try or search for other methods if you want