Where are the Mipmap quality settings?

I'm playing call of pripyat and i used to play it in a 3850 AGP 512. It had a mipmap quality setting that would actually smooth out the grass textures when set on the high quality mode. The settings look to have been gone from Crimson Control Center from the start. I now am playing on an RX580 and it looks like the lowest mipmap setting possible. I want higher quality mipmapping settings.