Smooth translucent blinds of white tulle. This 3d model is one-sided and for a realistic glare at side from the window, for example, from the sun, in this 3d model is a special shader of pseudo translucency VRay2SidedMtl is used. However, if for some reason, you prefer to use a conventional transparent material, then all you need is to apply for this 3d model a translucent material that is embedded in the Front slot of the material.
It is for this purpose, tulle has turned upside down polygons - with backfaces inside. This trick, as well as in the case of VRay2SidedMtl, will provide a realistic lit up at the free 3d models of tulle from the window. The lower part of the 3d models is bent under and creates the effect of hemmed bottom edge.
Also check out this horizontally tileable tulle curtain free 3d model!
Modeled in 3ds Max 2008. Rendered with V-Ray.