That is on page 45, but, after talking to DMcGee one evening, one CAN be in MP and NOT crawling.. so it CAN come up. The question comes down to, do you assess environment 1st or 2nd? IE, a model with 4" of movement:
4", -1 for environment = 3, 1/2 for MP = 1.5
or:
4", 1/2 for MP = 2, -1 for environment = 1.
That 1/2 inch, over 3 actions, adds up to 1.5 inches of a difference. I think that the FAQ team needs to descide which order penalties are taken.
If it wre up to me the order would be environment, then terain, then other factors. Environment affects all equally, and is easiest represented by just subtracting it from all models MV stat at the beginning of the game. Terrain next, for similar reasons. Other factors, such as MP, as its a choice of the model at that time.
Just my $.02
Jeff