I thought you might be interested in looking at Help me about changing NVIDIA Driver/DirectX's Pixel Shader version to repair OFP night-time graphic.
https://forums.bohemia.net/forums/topic/236183-help-me-about-changing-nvidia-driverdirectxs-pixel-shader-version-to-repair-ofp-night-time-graphic/?do=findComment&comment=3448299
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