Window covering materials include both soft window coverings (drapes, valances, café curtains), as well as hard window coverings (shades and blinds).
Window covering materials specify a window covering style file ( .vnw file extension), a special data file similar to a vignette, containing mask, illumination, layout, and texturing data defining the window covering.
vnw files do not include the color and texture (fabric) for the window covering. This information is specified separately, similar to repeatable textures.
Window covering materials can only be applied to Window Covering Frame Objects, which are overlapping objects.
Window covering style file; required.
Texture image file (second value for src= ).
0 (straight repeat)
Solid color (or colorizes texture).
128 (neutral gray)
0 (no sharpening)