Material->GetTextureIndex() always return zero

[Anonymous]

Hi!

I try write rendering Add-on (use reference Rendering DevKit) for ArchiCAD 11.

But I can't solve one problem:

When i create wrapper for MaterialDialogInterfaceImp interface, in event UpdatePreview I can't get material's texture.

Material->GetTextureIndex() always return zero.

bool AMMaterialDialogInterface::UpdatePreview (GSModeler::Material*    material, 
          void*       previewData, 
          long        previewDataSize, 
          const GSModeler::DrawingContext& drawingContext, 
          GSModeler::PixelMap*    pixelMap) 
{ 
Report("AMMaterialDialogInterface::UpdatePreview: texture index=%d\n", material->GetTextureIndex()); 
...

During thus time, material->GetTextureName(...) return correct texture name.

Whats wrong?
Sorry my english.