I would like to ask you for solution of this ... I have an assembly which I want to render in exploded state with visible assembling lines. I can't find a way how to do it because render allways turns off these lines.
You can't see "lines" in solid rendering because rendering discards line entities and only works with faces. Options are you build an assembly with exploded view and construct fake solids to use as lines, or you can try exporting the exploded view in a format that is compatible with an external software that can render polygons and line too. I don't know if it will work anyway.
Third and probably best option is render your image, then take a screenshot of the exploded view where all the objects are white with no edges, and composite the two