This is my Nvidia Inspector settings:
Try to redownload Inspector and reinstall it. Also, check in the Nvidia CP (the default Nvidia GC controls), if you have a SH3.exe profile and activate it (with defaults settings).
I use 1920x1080, 16:9 monitor, and Anhenerbe GUI works fine, with sun halo and a fine antialiasing for that resolution and settings (4x4 Multisampling).
Best regards and have you luck.
Fitzcarraldo