[ATI/AMD] distorted textures (Ecco, Shenmue 2, Headhunter, SoF, SW Racer and many others)

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What steps will reproduce the problem?
1.
2.
3.

What is the expected output? What do you see instead?
Black lines and artifacts appear on the background while moving underwater. It 
only happens on some areas but it is very annoying, otherwise the game runs 
almost perfect. The bug appears on the memory card selection screen too.

What version of the product are you using? On what operating system?
Demul v0.582, DX11 graphics plugin with default settings. Using Windows 8.1. 
All drivers and DirectX updated to the latest versions.

Please provide any additional information below.
Hardware: FX-8320, AMD R260X 2GB

Original issue reported on code.google.com by miguelin...@gmail.com on 21 Jun 2014 at 9:07

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Original comment by 0vet...@gmail.com on 21 Jun 2014 at 3:53

• Changed title: [ATI/AMD] distorted textures (Ecco, Shenmue 2, Headhunter, SoF, SW Racer and many others)
• Changed state: Accepted

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I can help to make some tests if you need. I like Demul a lot, shame I choose 
the wrong video card :(

Thank you for making this great emulator.

Original comment by miguelin...@gmail.com on 15 Feb 2015 at 12:15

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not needed, I have AMD video too
both Nvidia and AMD made various sort of hacks (for regualr people they call it 
"optimisations") to make ther products works faster, just in this particular 
case one of ATI/AMD's hacks is critical for PowerVR2 GPU emulation

Original comment by 0vet...@gmail.com on 15 Feb 2015 at 2:00