By the way, if the authors see this discussion: As an alternative to the 3D view and/or the rectangular hue/chroma view could you add a constant-value slice thr

By the way, if the authors see this discussion: As an alternative to the 3D view and/or the rectangular hue/chroma view could you add a constant-value slice through the color space that shows hue/chroma in polar coordinates, with gray at the center? That view is quite helpful context, especially for viewers who are new to the topic.