In fact I'm not sure of how works Nic DLL because I found some sources of an Lanczos3 aviutl plugin where you can use to process integer (with MMX) or use float (with SSE or SSE2).
So his version could be more precise (in term of quality) as I use the main resizing engine of avisynth wich deal mainly with integer (except for the resampling pattern of course).
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