Just a quick note, it's not that "Corona for C4D doesn't properly convert..." - it's that the VFB and the native Picture Viewer use different methods to translate the full linear data in a render into sRGB for display. This means when you have to save from the PV (e.g. when batch rendering), then you will end up with Cinema 4D's method of translating into sRGB, rather than the Corona method used in the VFB (that you will be used to from IR). It's not so much that either Corona or C4D "doesn't properly convert", rather just that they do the conversion differently :)