Because Kickstarter, in all its wisdom, will not allow photo realistic renderings.
A totally adsorb policy that greater minds than myself have discussed to conclusion elsewhere, I'm very disappointed that we've had to move across to IGG.
Kickstarter has restrictive policies or at least used to about only being able to raise money commercially if your a ltd company. I'm a sole trader at the moment and will only go ltd if and when funds permit.