Can someone please make the answer to this conversation public? I have been trying to figure this out for a year. ITs such a simple task. capturedRoom.Surface.Walls defines an array of walls. I want to collect the color of the wall that is scanned, and then apply that color to an SCNBox, set with the dimensions of the wall, and replace the wall with my box, so I have a room which detects paint walls. similarly, I want to provide a sort of modelprovider for common floor types, and then map images of those floor types (wood, tile, of many varieties) to the diffuse contents of the floor, but when I try to set anything to diffuse contents of the model that is made by room plan, nothing happens. it remains white and blank. why? please, post the answer here. don take it private, because then when the next person is struggling with this question they have no way of figuring it out beyond waiting for the response to come in an email. ugh.