Engine speed up

It occured to me that cars these days can push a huge amount of polys around, and that the bsp for the interiors is probably not needed so much (although it's handy for slower cards).

What *probably* causes most of the slow down with interiors is the amount of different textures, the card ends up doing loads of render state changes and this is probably the cause of any slow down on recent cards. What would be nice is if the engine sortid by texure and then sent everything using that texture to the card in one big whooosh, this would cut down on the number of render states and increase performance (as per nvidia and ati's reccomendations).

Just an idea, be gentle with me :)