   How to draw 2D vector data to 3D terrain?
  We want to draw 2D GIS vector data to 3D terrain using DirectX? Is there anybody know how to implement this? I search online and get something related to this http://wscg.zcu.cz/wscg2007/papers_2007/journal/b17-full.pdf. but I don't understand the whole paper and still confused "apply stencil mask to scene" section.I will be very appreciated if anybody give hand to me. thanks.   
  Their method is based on the stencil shadow volume technique. For more info on that check out chapter 9 in GPU Gems:http://http.developer.nvidia.com/GPUGems/gpugems_ch09.html/Mike   