   does support .x format support 4 vertices face?
  I convert mesh file to .x format and show it right both in dxviewer and my .x viewer.but look at below:Mesh woman_model_low_1 { 112; (vertex number)(vertex list)0.483662;1.411170;5.595504;,0.510341;1.318394;5.186752;,-0.123294;1.316997;5.186419;,-0.104347;1.385569;5.649803;,1.099879;1.148729;5.470424;,1.074264;1.143987;5.189803;,1.663278;0.605925;4.565669;............ 110;(face number)(face list that consist of a list of vertices, maybe triangle or quad ...)4;3,2,1,0;,4;0,1,5,4;,4;7,4,5,6;,4;11,10,9,8;,4;14,6,13,12;,4;18,17,16,15;,.............MeshMaterialList {if .x use 4 vertices to compose a face. how does .x load function do?(D3DXLoadMeshFromFile somthing like this)video card must accept triangle . I think video card do not support quad or other face.where is problem?   
  There's no problem. It creates 2 triangles and that's all.(ex : from 0, 1, 2, 3 you create 0, 1, 2 and 1, 2, 3.)   