Emulator

Game Name?

Shadow the Hedgehog

Game ID? (right click the game in the game list, Properties, Info tab)

GUPE8P

What's the problem? Describe what went wrong.

Although #11458 was fixed for most backends in 5.0-14812, the fix does not work for D3D11 and D3D12 when ubershaders are in use.

What steps will reproduce the problem?

Load Test2-Obj37.zip from #11458 while using D3D11 or D3D12 and ubershaders. Observe that the eyelids render as a solid color.

Is the issue present in the latest development version?

This issue is applicable starting in 5.0-14812, though the underlying rendering issue has existed for longer (see #11458).

What are your PC specifications? (CPU, GPU, Operating System, more)

• CPU: Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz, 2592 Mhz, 6 Core(s), 12 Logical Processor(s)
• GPU: NVIDIA GeForce GTX 1650 Ti
• OS: Windows 10 Home 10.0.19042.1110

Additional notes

The following is put into the log:

warning X3577: value cannot be NaN, isnan() may not be necessary.  /Gis may force isnan() to be performed

This message is logged even when using specialized shaders with D3D11/D3D12, though specialized shaders render correctly with specialized shaders. On ubershaders, it behaves as if isnan() is always returning false. This happens even if D3DCOMPILE_IEEE_STRICTNESS (which should be equivalent to /Gis) is enabled.

This problem can be worked around by disabling ubershaders (or using hybrid ubershaders to minimize the time ubershaders are in use).