My PC also doesn't work spectacular on the highest settings, but I switch to them when I take screens.. Indeed, I am having some bad lags during the menus, but after you take the screen you can just alt f4 and go back to normal settings
If you have way to much lag at the highest setting, you can open Maniaplanet in windowed mode and make the window really small. This is actually in a "best quality screen-shot wtf" tutorial I've started on, but haven't finished it yet.
About 90% of it are done with the MediaTracker!
I just did some coloring and increased the "fog"-effect.
It's almost incredible what you can do with the MediaTracker!
And ofcourse with a wonderful game like Valley...
The scenery is almost perfect. Just a few more things you
could add to it. But all in all I love it!
I hope you guys like this Wallpaper as much as I do!