Apparently, I cannot use that mode as it completely wipes all models/scenes/graphics out of the game... so if that has happened to you, then checking the "use shader 2.0/3.0 features" box to off, will fix that!

I had the same thing, game kept crashing with these options ticked.

What are these shader features though? It's kind of weird - I'm running an RTX 3070 and I can't use these shader features?

EDIT: If you check "use shader 3.0 features", click OK, then untick "use shader 2.0 features" and click OK the game actually uses shader 3.0 features. You can verify this by looking up the graphics settings through regedit (Computer\HKEY_CURRENT_USER\SOFTWARE\Crystal Dynamics\Tomb Raider: Anniversary\Graphics).

Thanks for that bit of info, I had a feeling that was the case, I just needed confirmation as I never would have looked at my reg settings!