|  |  | 
Sets a texel class value that indicates texel class according to each texel's location.
HRESULT SetGutterMap( BYTE * pGutterData );
| Texel Class | Texel Location | 
|---|---|
| 0 | Invalid point; texel will not be used. | 
| 1 | Inside triangle. | 
| 2 | Inside gutter. | 
| 4 | Inside gutter; texel will be evaluated as a full sample in the ID3DXTextureGutterHelper::ApplyGuttersFloat, ID3DXTextureGutterHelper::ApplyGuttersTex, or ID3DXTextureGutterHelper::ApplyGuttersPRT methods. | 
If the method succeeds, the return value is S_OK. If the method fails, the following value will be returned.
D3DERR_INVALIDCALLHeader: Declared in D3dx9mesh.h.