As the cars have become more detailed, fps has become impacted (see GT3 pack). That's exasperated by DX11 features and trying to run at higher DX11 levels. Detailed cockpits are needed for VR, so there's little desire to reduce detail there. Models made for multiple games (e.g. Assetto Corsa and rF2) means we'll continue to see higher detail on the exterior as well. Short of a coding miracle, I think the only way to eke more fps out of rF2 is if the switch from LOD A to LOD B (and maybe from LOD B to LOD C) happens sooner. As far as I know, this adjustment is not available to the player. You might think the LOD switching is tied to Opponent Detail, but Opponent Detail only changes the textures rather than the LOD distance (which is what used to happen in older games). In favor of this approach is that new LOD B models are about as detailed as the older LOD A models. Those older LOD A models have been fine for the majority of rF2 players over the years, so I don't think we'd be losing much by having LOD switching happen sooner.