What kind of flicker in the shot? Flicker on the edge or in whole render object? IMHO, if it’s on the edge, sometimes I will use defocus or blur or mix a little bit and then sharp the edge and that can only decrease the flicker…..if it’s flicker on the 3D object, flicker remove might work. Usually I will ask 3D guy to re-render those problematic frames because sometimes this kind of situation just due to network render and re-render can solve.
Not sure if those can help…..please forgive me if not…..
Jeff