I came together with a colleague on the trick. It's about improvements to the existing shadows, High to Ultra, you just need to manually change the settings, which the game officially does not yet offer.
There is a need in the saved games file options.lua change the value of the Shadows on the 5 which is Ultra. Do not be discouraged in the menu of the detail settings you will point Shadows 0.
This has the advantage that :) the integrity check will be fine.
Comparison of the parameter:
--high
3072,
{0.02, 25.0, 100.0, 400.0, 1500.0, 7000},
{0.02, 2.5, 25.0, 250.0, 1500.0, 7000}
--ultra
4096,
{0.02, 25.0, 100.0, 500.0, 2000.0, 7000},
{0.02, 2.5, 25.0, 300.0, 2000.0, 7000}