Outlines in viewport not the same as in capture?

Bogdan , this is a known issue which will be resolved with our next preview and upcoming full release. Thanks for the report still. If you want to avoid this behavior altogether, I advice downgrading to 2.4 temporarily.

I found the output of v2.6 is quite fine too, if outline thickness is set to 0% and the slider moved an invisible tick per right arrow button. The slider shows still 0%, but there is an outline at the saved output. Maybe not so thin like in the past, but maybe usable. I use v2.6preview for my current project and it's quite stable so far I have seen.

Here an example of a 3000x1500 shot:

Quote from Micha

I found the output of v2.6 is quite fine too, if outline thickness is set to 0% and the slider moved an invisible tick per right arrow button. The slider shows still 0%, but there is an outline at the saved output. Maybe not so thin like in the past, but maybe usable. I use v2.6preview for my current project and it's quite stable so far I have seen.

This works perfectly, especially when you use white models in first phases of project! Thanks