I am having an issue with parts that have had their apperence set to be trasparent showing up as just a wire frame. The part is a trasparent orange to represent Ultem plastic. No matter what I have the percentage of transpency at it still ends up looking like a wire frame. I have been using this same apperence for over a year with no problems and just now it doesnt want to work. Is there a setting that some how got changed or is this a bug?