MaterialX: Incorrect result using place2d node with image node

[ashwinbhat]

Description of Issue

Using a MaterialX document that uses an Image Node with place2d to manipulate texcoord produces incorrect result in UsdView. The expected result is as shown below (from MaterialXView)

In UsdView the scale is incorrect as place2d is ignored.

On debug build I get an assertion at
> usd_hd.dll!std::vector<std::shared_ptr<pxrInternal_v0_22__pxrReserved__::HdDataSourceBase>,std::allocator<std::shared_ptr<pxrInternal_v0_22__pxrReserved__::HdDataSourceBase>>>::front() Line 1603 C++ usd_hd.dll!pxrInternal_v0_22__pxrReserved__::_ConvertHdMaterialNetworkToHdDataSources(const pxrInternal_v0_22__pxrReserved__::HdMaterialNetworkMap & hdNetworkMap={...}, std::shared_ptr<pxrInternal_v0_22__pxrReserved__::HdContainerDataSource> * result=0x0000005653bd81d8) Line 2524 C++ usd_hd.dll!pxrInternal_v0_22__pxrReserved__::HdDataSourceLegacyPrim::_GetMaterialDataSource() Line 2690 C++ usd_hd.dll!pxrInternal_v0_22__pxrReserved__::HdDataSourceLegacyPrim::Get(const pxrInternal_v0_22__pxrReserved__::TfToken & name={...}) Line 2903 C++ usd_hd.dll!pxrInternal_v0_22__pxrReserved__::HdMaterialSchema::GetFromParent(const std::shared_ptr<pxrInternal_v0_22__pxrReserved__::HdContainerDataSource> & fromParentContainer={...}) Line 76 C++ usd_hd.dll!pxrInternal_v0_22__pxrReserved__::HdSceneIndexAdapterSceneDelegate::GetMaterialResource(const pxrInternal_v0_22__pxrReserved__::SdfPath & id={...}) Line 975 C++

Steps to Reproduce

1. Extract attached zip file.
   image_place2d.zip
2. Open test_image_only.usda in usdview the mtlx documents, image node is handled correctly.
3. Open test_image_place2d.usda, notice that texture is incorrect scaled.

System Information (OS, Hardware)

Windows 10

Package Versions

v22.03

Build Flags

build_usd.py --openimageio --opencolorio --draco --materialx --embree

[jilliene]

Filed as internal issue #USD-7255

[JGamache-autodesk]

I did start debugging a similar issue in usdView where the texture mode was set to the file default of UsdHydraTokens->clamp instead of the MaterialX default of UsdHydraTokens->repeat but I did not have time to find out exactly where the MaterialX defaults should override the file defaults in Storm.

You might want to try adding

    <input name="uaddressmode" type="string" value="periodic" />
    <input name="vaddressmode" type="string" value="periodic" />

to the image node in test_image_place2d.mtlx and see if the texture responds correctly.