You cannot expect much if you only test a sphere. It’s meant for more complex scene or lighting.
It’s meant to be used with high frame sampling, it’s not really a real time effect. The noise is to be expected.
However the line thing looks like a bug, for some reason it doesn’t happen on desktop.
You can fix the issue a bit by enabling “linear” in the Debug menu, but I’ll look into it (checking this option might break other stuffs).
Here is an example of usage in an extreme case (the spot light is very bright).
Sampling count was on 1000.
It’s a screenspace effect so it has all the limitation of screen-space technique.
