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FXAA on mobile broken?

For some reason, mobile does not allow me to turn on FXAA. MSAA works, TAA works, but not FXAA. Fix?

I think FXAA relies on deferred rendering. Mobile is currently forward render only?

FXAA is pretty much just a simple postprocess, There is no reason it shouldn’t be working.

No FXAA under Forward Renderer (at least last time this documentation was updated):

Forward Shading Renderer | Unreal Engine Documentation

Oof. That sucks.