Confirming that grey classes, data visualizations, and class overrides still do not render in hidden line renderings. This could be resolved by linking hidden line rendering object attributes to design layer object attributes. Objects in hidden line viewports would then be obey class overrides and data visualizations, giving the user more control over hidden line renders. This would also allow for an all class override to black/specific line weight as a default, preserving the way hidden line works currently. Even if mapping object attributes to hidden line attributes comes with a rendering time penalty or higher resource use, this options would be hugely helpful for situations where you need a clean line drawing but also need to delineate between different classes/parameters.