Anyone looking to for a fix for 21:9 monitors i have found one
So the main issue with the game is when you have 21:9 resolutions is that the game stretches the image so you need to fix the aspect ratio so it stops the stretching
Cons of the fix (so far haven't played beyond the start of the game will up date if i find more)
Cutscenes stay in 16:9 (dose not include in engine scenes)
Menus stay in 16:9 (that means inventory and map menus)
Fix
You will need to edit the registry
Run regedit navigate to HKEY_CURRENT_USER\Software\Eidos\Deus Ex: HRDC\Graphics\ (Or Deus Ex: HR if not Directors Cut i think only have DC)
Find AspectRatio and edit it set it to decimal
Ok this was the hard part to work out (thanks to Lara Croft and the Guardian of Light Widescreen Solution & Issues for the formula)
The formula is:
AspectRatio (decimal) = Width Divided by Height x 10000
So for Example 2560x1080 is 2560 divided by 1080=2.37037037 x 10000= 23703
Setting the AspectRatio to
23703 for 2560x1080
23888 for 3440x1440
Your game should be in 21:9 now (don't worry about the black bars ratio works in game)
That seems to have fix the stretching issue in engine so happy 21:9 gaming
*Deus Ex: Human Revolution 21:9 fix ultra wide fix*