I'd like to understand the difference in using the default value for maximum threshold (5 mm) instead of a custom value in mris_thickness function.

Is the map of cortical thickness the same in both cases and the difference resides in the saturation (all values above 5mm are cut to 5 mm) or do we have a completely different map (all values above 5 mm have their own value but saturated value is displayed from 5 mm and above)?