Is it possible to scale back motion blur for certain actions but keep it high in others? For example, riding a horse. When the horse is running the motion blur is much higher. When he is walking it is much less?

Also, is there a way to avoid object clipping? For example, I'm holding a weapon I look down and the object goes through the floor or wall.

Is it possible to achieve these things without the engines actual source code?

Thanks.

you can scale motion blur but globally (D.mtnScale iirc)
obj clipping - yes but needs to be done manually