If you have tried to create a good accurate render of a view using the solar settings, the shadows are jet black and it takes a lot of effort to get them to appear as a real shadow.
I have spoken to support to see if they can make them realistic and they said NO.
I propose that they (by default) give us realistic shadows.
Ian
Not sure what you are trying to achieve or mean by 'real shadow'. Maybe you need to render the view using the Render tool? If a more 'real' shadow requires more processing and slows things down, most users would not support this.