Posts from PROBLEM with textures in x64 versions of Windows when used with Nvidia graphics cards.
The graphics settings parameters in the file have names like:
setvar gfx_16bit_mode = 0
setvar gfx_16bit_textures = 0
setvar gfx_anisotropic_filter = 8
and so on. Attention! The easiest way to set the desired graphics level (the game defaults to low settings) is to make a copy of the configuration file, then go into the game and set the desired settings there. Then exit the game, open both files - the one you copied and the one that was just edited by the game - and compare the changed parameter values. Next, we simply set the desired parameter values in the file we copied and save it to replace the file that was edited by the game, after closing the latter.
After all these manipulations, the textures in the main menu remained blurry for me, BUT all other textures started to display correctly.