The Void Born description indicates Low Gravity makes everything rough terrain for non voiders. The movement section indicates everyone gets a +2 Ag bonus for movement on low gravity and doesn't mention things being rough terrain.

I'm thinking the movement section wins, but zero gravity (or micro gravity) *is* rough terrain for non voiders.

Nojo509 said:

Correct. Non void-born get penalties for movement in low grav.

Makes sense. Rules are probably not all in one place because magboots were introduced only in IHB.

So with magboots, count Mv with Ag +20, then halve Mv, no checks, correct?

But also, what test difficulty (for "default" with those adjustments)? Maybe, more grades than "normal/low/zero"?

Is there more on this in Rogue Trader?