I’m working on blender 4.0 and trying to create a ground truth image starting from an object with an emission material. My problem is that, even if the material assigned to the object is white and black, in the rendered image there appears to be a colour gradient at the edges of the regions.enter image description here
How can i remove this gradient and have sharp edges?

The corresponding material is the following
enter image description here

and the render settings are view transform -> standard (wich i need because otherwise the emission rendered color is not totally white) and dither -> 0