I have a question about exporting my technical drawing as PDF. When I set the output type as raster, the lines are the correct type (set as in my Rhino view window). However, when I want to export as vector, it changes the line definitions.
buddy, sometimes things are not that straightforward. You should first make it a 2d drawing by Make2d command, also check hidden line, and then use that 2d drawing for print. it will hardly take a minute.
Apart from what was said, in Rhino 7, when you print a shaded or technical viewport as vector, the wireframe will be printed, resulting in what you see.
In Rhino 8, when using a technical display mode and printing as vector, hidden lines will use the Hidden linetype.