Fun Fact: The game uses the same engine as Jedi Knight/Mysteries of The Sith/Indiana Jones & The Infernal Machine.

Look at those games and see what fixes people have tried.

While it does use some of the same file formats as other Lucas Arts games, TPM does not use the Sith engine like those you mentioned, so the fixes are incompatible.

It uses an original engine created by Big Ape Productions, which they nicknamed "Obi".

I have good news. I had a little time to have a quick look at it and I fixed both problems.
The failed DX init through non-default virtual cards is actually a bug which I fixed and this also solved the fog-problem. So, I think it's the usual problem: the game wants w-fog with T&L vertices but leaves the projection matrix set to orthogonal projection. (The default card follows the DX specification so this combination will still not work with that.)

I also improved the z-biasing implementation a bit, it's working details is very poorly defined in the D3D specs (and the z-buffering method used in this game is not the usual one). This fixed the shadow and scorch marks.
I'll release a patch version some day, that'll contain the fixes.

Awesome! I never had a PC that was able to render all of the game's graphics properly. Even my oldest PCs were always missing one or two effects. I imagine these issues were very widespread. This is a big deal for this game.

Between this and your FPU fix, TPM is finally behaving like a normal PC game, probably for the first time ever.

I also really appreciate the little explanations. After years of searching for fixes, it feels very vindicating to know the causes.

Thank you!

Altough I already fixed some other things in dgVoodoo, I still don't know when to expect a new release, so I publish the fix here. So, you can use and test it and see if still there is a problem somewhere: 😊

http://dege.fw.hu/temp/dgVoodoo2_76_TPM_fix.zip

I really appreciate that, thanks! I can confirm that it is fully playable without any fear of missing out on any effects.

Though there is actually a minor issue that I've never noticed before now; it seems to have been present since previous versions of DGV2.

When forcing a resolution, there is some artifacting around text in the Load Game menu and in the Options submenus when they are accessed from the main menu.

The artifacts disappear when exiting and returning to the options menus, but the ones on the load game menu never go away.

There are no artifacts when accessing these same menus from the in-game pause menu.

There are no issues at all when playing with unforced resolutions or with integer scaling.

Nothing major, thanks again!

Do you use any special settings in dgvoodoo or ingame ?
I try on my side, I have no fog at all ?

In the DirectX settings, you need to select any one of the two GeForce virtual cards or the ATI one to get the fog working.

There is no fog when using the default one or the Matrox option.

MetaG64 wrote on 2021-10-30, 21:37:

In the DirectX settings, you need to select any one of the two GeForce virtual cards or the ATI one to get the fog working.

There is no fog when using the default one or the Matrox option.

Thank you it work now.