2D Guide alignment is good but still no model recognition

I've attached an image displaying my guide alignment.

I know having a single color isn't recommended, but the model targets in unity tutorial displayed it working with a grey mono-colored model. The lander model is more detailed and has more contours than mine however. But looking at my screenshot, i'm surprised that vuforia can't distinguish my model from the background. Is this because the digital model doesn't have enough distinguishing features, and if so, could that be something that the Model Target Generator reports? It might be giving me the false hope that my model will work.

I'll try painting the model to see if it will make the surfaces more distinguishable.