There's ocassional (about 10% chance) that from the start of the game you just cannot look into the combat space of the map, as it is causing major (down to 0.5) FPS drop.
- It doesnt depends on the map itself, but produces much harder FPS drops on River City since there's a lot of background details and animations. Beside that, I've already encountered it on all maps available.
- It doesn't depends on presence of mechs in a line of sight and FPS still broken even if both enemy and allied teams are brawling on the other end far away.
- Turning away to the off-side of the map reduces or completely negates FPS drop. Turning back brings it back.