I got a reply from AnyLogic support as follows:
Right now, we are working to improve the performance of 2D and 3D animation at run-time. In particular, in the latest version, the level of details changes while zooming in 3D window, i.e. objects that are further away have less detail than closer objects. On your screenshot, 3D objects look unacceptably bad at a relatively short distance and you can do nothing with this. However, as far as I know, there will be an option to tune the distance where the quality decreases in the next update.