It's me again. Since the Cologne Aachen update, I've been experiencing these blurry textures when using the game! Unfortunately, the entire route is affected. Stations, tunnels, and houses simply look blurry. It's the same in the driver's cab. Restarting helps, but it doesn't take long before it reappears. Strange.
Unfortunately any German routes that are released/updated in TSW5 are extremely poorly optimised and it feels like DTG aren’t doing anything about it, I suffer the same issues on Series X and to me it just ruins the immersion of the route.