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GPU FFT utilized by the FFT convolution bloom filter

Is there a way to access the FFT library utilized by this filter? I’ve tried to find it in the source and can’t seem to have any luck.

I personally have no idea… i ended creating a FFT kernel using Content Driven multipass though…
if someone knows if the FFT is accessible it would be nice… but i’m pretty sure it’s something more tangled with the engine, like a Shader Factory