If AC3D is a native vertex modeler, try this: Make sheet of quads (squares) about 10x12. Open it in UVM and map it as a pure rectangle. Open it and the leg in the modeler and morph it around the foot. I have found that the mapping is better preserved if the points that meet are given identical locations, but not welded. It makes morphing the finished prop tricky - the points must stay identical. You can subdivide as much as you need to, to get the right shape, but do not add points outside the perimeter. Keep as many of the facets quads as you can. Poser seems to smooth quads better than triangles. It is making clothing sort of the same way real clothing is made.