this was already probably a bit of an annoyance earlier to me, but someone brought it to my attention.
on the left, you've got a screenshot of a drawing on a layout with a break-line object with a masking fill covering the rest of the slab section details.
on the right, you've got a screenshot of the same drawing in PDF, & you'll see a most of the masking fill covering the slab section detail except when it gets to the boundary of the drawing -- where you'll see a bit of the covered model poking through the drawing boundary. it's thickness depends on the thickness of the pen used for the line / cut-line. the only fix we found for this was to add ANOTHER masking fill in the layout just to cover this protrusion. i even tried adding a white line boundary around the drawing & the black dots still pop-up. no matter if i put the masking object/fill to the top of the Display Order, the dots still appear.
the attached file is a PDF of the published layout. i used other elements that can replicate a 'masking fill'.
in the second drawing, i've cropped both ends to where a masking fill is supposed to cover the thick lines. masked by either the object, fill, slab or even the text with a background fill.
you'll notice that the lines still poke through as dots in each instance -- even with the 2D text. immediately after the "c" for 'breakline object" & just above the first "L" for "slab with cover fill".
Archicad has been like this, for as long as I recall. You need to mask off the whole thing and show the whole masked area on your layout. If you trim the placed drawing across the mask, you get these 'dots' as you fittingly call them.
Doesn't make sense, but I learned to live with it...
Thank you very much for sharing your experience with this issue!
Based on the screenshot, it looks like upon exporting to PDF, the masking effect somehow failed to cover the end of the line, thus rendering a tiny cut piece of it. Unfortunately, I couldn't find this object in the default Archicad library, so I assume this is a custom object?
Thank you very much for pointing it out, I must have missed it somehow. Sorry for the mistake!
I could reproduce the issue now. It seems to confirm my assumption that the drawing's border causes some trouble with the masking effect. I will ask my colleagues to have a closer look into this. As soon as I have an answer I will let you know!
Thank you very much for your help in this case so far!
I have received an explanation from the development: unfortunately, this is a known consequence of the current implementation on how the elements are drawn in the PDF export.
In the output (PDF, print) the drawing border is not used as a clip polygon, the lines are cut shorter instead. But this causes that the line endings are visible at the end. So the line ends at the border of the drawing, but the round line ending goes out of the border.
To change this behavior, it will be a very big task. The whole area has many design questions as well, e.g. if we clip with the drawing contour, the lines that are exactly at the edge of the drawing would be visible only with half of their thickness.