Thank you! that’s a nice hint. I’ll try it as soon as I can get to it.
An issue here, however, is that I was simply aiming to enable the out-of-the-box ContrastAdaptiveShading algorithm. I wasn’t explicitly selecting either 2x2 or 4x4.
But I’ll test after changing that line of code you suggested which, a priori, does not seem exclusively related to the preview visualization.