Bloom Transition

I’m trying to make it so the screen will smoothly bloom to a bright white and then return to normal. All attempts I’ve made do not work since I cannot put a timer in something hooked with RenderScreenspaceEffects. How would I go about doing this then?

Yeah, you should never put a timer call in a render function. Creating a timer every frame = bad.
Try storing a variable using CurTime() or something and use math.Approach to slowly LERP it to your desired value and back