I have a 4K monitor and I used dgvoodoo2 to force this resolution. However, I have a problem. During the game, it seems that Bump Mapping is disabled, but when you press the M key which activates the possibility of mutation of these four genehunters, it is enabled.
There is a gameplay of this game in 4K on YouTube and I am convinced that dgvoodoo2 was also used here, but from what I see, bump mapping is enabled during the game. Mainly, it is about this glowing effect on the characters.

https://www.youtube.com/watch?v=EfWpwylhERg

There is also another gameplay in which dgvoodoo 2 was also used to record it in 4K and here there is no bump mapping effect that is in the first one and the characters do not glow.

https://www.youtube.com/watch?v=Z58uO0_4cMc

I do not use these high resolution textures. I have the original versions from Steam and GOG.
When I don't use dgvoodoo2, the maximum resolution of 16:9 is 1080p that can be obtained in the registry and this effect of shining the character occurs. It is not there only when I use dgvoodoo2.