CreateScene() calls CreateCube(), which calls CreateCubeDetailed(), which calls AddTexture() only if the user has selected Texture in the UI:
void AddTexture(KFbxMesh* pMesh) { // The Layer 0 and the KFbxLayerElementTexture has already been created // in the CreateCube function. pMesh->GetLayer(0)->GetDiffuseTextures()-> GetDirectArray().Add(gTexture); }