Subdivides faces on a mesh, allowing for conservative adaptive sampling that will not eliminate features on the mesh.
HRESULT RobustMeshRefine( FLOAT MinEdgeLength, UINT MaxSubdiv );
If the method succeeds, the return value is S_OK. If the method fails, the return value can be one of the following: D3DERR_INVALIDCALL, E_OUTOFMEMORY.
Header: Declared in D3dx9mesh.h.
ID3DXPRTEngine::ComputeBounceAdaptive, ID3DXPRTEngine::ComputeDirectLightingSHAdaptive