Caius has published a great, up-to-date guide on adding global pixel shaders to an Unreal 5 project without modifying the engine.
Sorry if this is a dumb noob question but I was wondering if it is also possible to add global vertex shaders that can transform every vertex of every mesh before it gets rasterized. If so, how could this be acheived and would it be possible without modifying the engine code i.e. by registering an FSceneViewExtension?