@kas1e
On which version of Payback is the OS4 version based on?
My powerpc.library includes tons of workarounds for other uttlerly broken Warp3D software as well, but the WarpOS/Warp3D version of Paypack was one of the worst, even worse than Heritic II.
Even the AmigaOS 3.x/m68k version worked
much better on AmigaOS 4.x than then the WarpOS version did, except that neither sound nor joystick support worked with the m68k version but, at least partially, did with the WarpOS one and my WarpOS/Warp3D wrapper.
Of course using any m68k version of a game on AmigaOS 4.x is much slower than using a WarpOS/PPC one, but getting faster crashes with a WarpOS version doesn't help at all
Warp3D Nova may have changed a lot, and I never re-tested any of those ancient Warp3D software with it.