Also PFhoe, hopefully will support Carrara soon.Might want to ask them. They talked about doing a plugin. It is much cheaper than both(altho syntheyes is the better deal of the 2 above) http://www.thepixelfarm.co.uk/Forum/default.aspx?g=posts&t=24 Unfortunately, it cost money that would have been amazing, but not at that price. These companies have to earn a living.Syntheyes cost less than camera equipment. Motionbuilder is also expensive. The 2 apps that are free listed above are great applications also(Voodoo is for non- commercial use tho).

No need to think outside the box....
    Just make it invisible.