I want to create a pure black and white image (not grayscale), like the one at the end of my post. The method I used was first to make the image grayscale (with color calibration) and then to create two instances of rgb curve on top of filmic. The first one making all pixels above the threshold white and the second one making the ones below black. I used parametric mask so that the placing of the “knee” in the curve didn’t need to be very precise and exactly 90° (see the picture to get the idea). Do you have any other ideas how the same effect could be achieved?