As a continuation of my previous post, I am working on a tutorial of the KLWP filters, and it seems to me that the multiply filter is not working. I created a horizontal black gradient from #FF to #00 and a vertical black gradient from #FF to #00 and overlapped them. My understanding is I should have seen a resulting image that looked like a radial gradient from the corner of overlapping #00 to the opposite corner with #FF. I tried similar test without gradient and with #DD opacity, but with a tonal shift. Every time the resulting image was the same, nothing appears on the screen.
Didnt forget about these posts but i need time to check this