minor fix in impostor rendering system

WickedEngine/wiRenderer.cpp

@@ -3817,6 +3817,7 @@ void wiRenderer::RenderMeshes(const XMFLOAT3& eye, const CulledCollection& culle
 							break;
 						}
 					}
+					SetAlphaRef(0.75f, threadID);
 					GetDevice()->DrawInstanced(6 * 6, k, threadID); // 6 * 6: see Mesh::CreateImpostorVB function
 				}
 			}

WickedEngine/wiVersion.cpp

@@ -9,7 +9,7 @@ namespace wiVersion
 	// minor features, major updates
 	const int minor = 11;
 	// minor bug fixes, alterations, refactors, updates
-	const int revision = 46;
+	const int revision = 47;
 
 
 	long GetVersion()