Fureniku's roads has paints that are able to be placed on road surfaces and the like, they recently switched to a new rendering technique to help with RAM usage, these new rendering paints for some reason with foamfix installed do NOT appear in item frames but the old paints DO.
the picture I am enclosing shows a new render paint on the left {the handicap sign} and an old paint {the hatch mark} on the right. you can see the right one is a more 3D model where as the left one is completely flat now.

the second pic shows the ? paint not rendering in the item frame and you can see with WAILA it shows that the ? is in fact in the item frame but not rendering.