with permission from Ves the creator of the xvision preset . I have modified the assets to be used without xvision and are fully compatible with 11.50 vulkan.
Copy the resource folder into your x-plane folder, click yes to overwrite. Maybe make a backup first of your cloud and skycolor folder if you want to revert.
I can also recommend to use this in combination with the x-visibility script. Which also seems to work fine in 11.50 vulkan.
I hope you enjoy it