Newsprint rolls and (paper rolls) are/were generally shipped in boxcars, maybe a refer to get the car somewhere more useful. I would imagine that the asset doesn't have a mesh as it was intended to be loaded in a closed car. You would need to ask the author or look at the config file for the commodity and see if it has a mesh or graphic of some sort to know for sure. If I was making a commodity asset similar to that I would probably not include a visible load to it as that sort of load is normally only seen as it enters and exits the car. I might put a visible load for a boxed product, but for rolled paper it just wouldn't seem to be worth the time, as most paper handling facilities are protected from weather such that it would be difficult to find a view of the load (Some facilities in the southern US have more open loading platforms but for the most part there is a building in the way of observation). I might, to represent a car in a facility being unloaded/loaded, use a faux load like a sort of picture box by the door to hide the empty car; but, having worked transporting paper in the US, I saw that once a car was loaded it was closed, and wouldn't be open until they were being unloaded.