[BUG] NanoVDB viewer fails to render with OpenCL/OpenGL backends

[Depersonalizc]

Environment

Operating System: Windows 11 Version / Commit SHA: VDB 8.1.1, SHA: 4a186c2 Other: MSVC 19.29.30148.0, C++11

Describe the bug

The NanoVDB viewer failed to render correctly with OpenCL or OpenGL selected as the backend (but CUDA worked)

• For fog volumes, an elongated cuboid was drawn.
• For level sets, only the background checkerboard pattern was drawn.
• For points, there's nothing but a blank screen.

To Reproduce

1. Build NanoVDB with

   cmake -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake `
     -DUSE_NANOVDB=ON -DOPENVDB_BUILD_CORE=OFF -DOPENVDB_BUILD_BINARIES=OFF -DOPENVDB_ROOT='C:\Program Files (x86)\OpenVDB' `
     -DNANOVDB_BUILD_EXAMPLES=ON -DNANOVDB_USE_INTRINSICS=ON `
     -DNANOVDB_USE_OPENVDB=ON -DNANOVDB_USE_TBB=ON -DNANOVDB_USE_GLFW=ON -DNANOVDB_USE_NATIVEFILEDIALOG=ON `
     -DNANOVDB_USE_CUDA=ON -DNANOVDB_CUDA_KEEP_PTX=ON `
     -DNANOVDB_BUILD_UNITTESTS=OFF -DNANOVDB_BUILD_BENCHMARK=OFF DNANOVDB_USE_MAGICAVOXEL=OFF ..
   cmake --build . --parallel 4 --config Release --target install

2. Run the NanoVDB viewer and load a grid.
3. Switch the backend to OpenCL or OpenGL
4. See error

Expected behavior

Correct rendering of the NanoVDB grids should appear.

[GrouchoChaplin]

seeing the same thing.

[GrouchoChaplin]

@Depersonalizc Did you find a solution to this issue? What version of OpenVDB/NanoVDB are you using?