ID 393863 - Radeon RX400/500 GPUs don't show decals when the 3D viewport is set to Advanced mode

Problem summary
Radeon RX400/500 GPUs don't show decals when the 3D viewport is set to Advanced mode.

Tested with a Radeon RX480.

Customer reported version
modo.13.0v1 - Radeon RX580

Customer reported platform
windows10

Steps to reproduce

1) Download and open the attached file.

2) Set the 3D viewport to Advanced mode.

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3) Select Render>Render, compare the rendered image with the 3D viewport, notice how the decals are not present in the 3D viewport.

Expected behaviour
In Advanced mode, the decals should be shown within the 3D viewport.

Actual behaviour
The decals are not being shown within the 3D viewport.

Workaround
If you turn on HMD Ultra Quality the decals are then shown within the 3D viewport, however, this will affect the performance of the scene.

 

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Reproduced by support

This bug has been reproduced in:
Modo 13.0v1 - Windows 10

Modo 12.2v2 - Windows 10

Modo 12.1v2 - Windows 10

Modo 12.0v1 - Windows 10

Modo 11.2v3 - Windows 10

Modo 11.1v1 - Windows 10

Modo 11.0v3 - Windows 10

Modo 10.2v4 - Windows 10

Earliest version tested
Modo 10.2v4 - This issue appears to be in all versions of the product.