I'm trying to use HitFilm Express 2017 to recreate a motion graphics effect I saw recently. The end result looks like progressive bands of color sweeping up and across the screen in very defined columns, as though a large fan shape were being run through a mosaic filter.
My attempt was pretty simple. Make a plane, scale it to make a wide band, and rotate it a bit. Add a grade layer above it, and apply the Mosaic filter, with 7 horizontal blocks and 20 vertical blocks. It gets me mostly there, but the Mosaic filter leaves semi-transparent blocks on the edges. I want all blocks to be either 100% opaque or 100% transparent, nothing in between. I tried adding various effects below Mosaic to tweak the levels, but couldn't find anything that fully eliminated the transparency. The closest I got was with Posterize, but even playing with its controls I still had some slightly transparent blocks on the edges.
Any ideas on how to get this to work?