This thread is already a bit older but I witnessed the same clipping errors lately after switching to a bigger screen.
You are probably thinking the same what came to my mind: a bigger screen alone can't trigger this!!
And you are right. I changed another option in windows with the new screen:
In ...

<r> Have you tried the -dd_sw or -altFont options?<br/>
Even if it doesn't make a difference for my system, maybe it does for yours?<br/>
These options affect the display as well.<br/>
No other ideas here, sorry.<br/>
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<IMG src="https://www.matrixgames.com/forums/upfiles ...

<t> yes, Im pretty sure you can adjust the resolution pixel-wise without any worry for your hardware using the f-suffix.<br/>
I had the same issue with the windowed mode - but using W10 here.<br/>
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My command line: WitPaAE.exe -wd -pxf1900 -pyf1060 -deepColor -dd_sw -altFont -archive<br ...