Ignore Solid Snake
Lmao. Screw Temporal filters and any feature in realtime rendering that dependents on it.
@Idaeus I’m still a little interested in what’s happening with the shadows?
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Are you using Lumen and what kind of light is flickering(movable point light?, stationary spot light? etc)? 
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Are you using distance field/cascade shadows or Virtual Shadow maps? The reason I ask is both have issue depending on how you are rendering you’re meshes(3. see below) 
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LODs or Nanite? Virtual Shadow maps have issues with Lower poly meshes and/or LOD/non-Nanite meshes