IOS Shadows walkaround

I have exported Mobile Sun Template project to iPad Air, It is looks great but one thing looks bad. Shadows looks like dirt and they are very ugly. Is there any way to put in config.ini file some walk-around solution. For example to not use mobile compression for static lighting, better for me to use Desktop compression on mobile? We have very bright interiors so it is looks very bad when you have directional light coming through the window casting dirt.

I knew i can turn it off but then it is looks flat and unrealistic.

Perry Milton

I think it’s related to this:
Sun Temple on iPad Air2 looks TERRIBLE!!! - iOS Development - Unreal Engine Forums!!!