Yeah just found that, but it doesn't work when the object is partially in front of the camera and partially behind. And it is more of a reticle style thing. I don't want to know the size of the bounding 2D region, I want to know the scale of the object. So I only want to check the size one axis.
I'll figure it out... I forgot about the cameraproject function when I was asking the question.
I'll figure it out... I forgot about the cameraproject function when I was asking the question.