I’ve recently created a set of atlas maps in v3.6 that display contours. When I render a single page as PDF it obeys the rule based display settings (for index and intermediate contours).
If I run the same example as an atlas, all the line weights appear the same. The ‘rendered view’ that shows in the print composer after the PDF has renders shows the correct line symbology.
So I’m wondering if the atlas uses the same PDF renderer, or if there is some other step I’m missing in the atlas logic