https://bugs.winehq.org/show_bug.cgi?id=39132
--- Comment #7 from tzone@posteo.de --- On an afterthought, I checked again with 1.8 and compared the result to 1.9.11. I couldn’t note a difference with that save. Note, that except for the Unofficial Skyrim Patch the installation was not modified back then. Adding the enhanced Lights and FX mod did probably remedy the issue though. For that save game it was still not fixed around Whiterun, but on a clean shadows mostly work again.
I still have some flickering on the corners of cast shadows and occasionally where shadow stripes appear. The largest one lately was a tower, but everything else works.
I also occasionally saw similar shadow stripes in mod screenshots, so I’d conclude, that it is mostly a Skyrim issue. Maybe it’s solved with Skyrim HD (or worsened). ;-)
The fps impact of Enhanced Lights and FX even on Intel graphics (Haswell) doesn’t render the game unplayable. It mostly increases contrast and disables ambient light.
Anyway the main issue with modding is getting the Mod managers to work.