It's not dithering at all, it's grain added on purpose via the GrainFactory4() Avisynth script(I'm a movie grain whore
). But you can see that 10bit untouched mVR processing and SmoothL+8bit YUY2 LUT in ffdshow+mVR dithering look identical, which was my original point...so to me that still leaves the ffdshow LUT option very much open.