As you already add a Lanczosresize on the filtered so it matches the same pic size of the source .... think about this:
Code:
Function SBSC_Interleaved(Clip orig,Clip filtered)
{
OX = ClipA.Width
OY = ClipA.Height
ClipB = ClipB.Lanczosresize(OX,OY)
ClipA = ClipA.Subtitle("Clip Orig")
ClipB = ClipB.Subtitle("Clip Filtered")
Interleave(ClipA,ClipB)
}
So you can just use the frame step button in Vdub etc. to switch between the orig/filtered. Its like in Photoshop "layer on/off".
When switching between layers diffs will be more recognisable for human eyes compared to a horizontal stacked pic alignment.