Dead Cells - Ultrawide Fix

MY MAN

Wow! And they said it was impossible because pixel perfect game and yada, yada, yada

Thanks!!

Hi, thanks for the patch! however, I cant seem to get it working with extracting the files into the game file. Has this been patched?

Don't know how much different the files are on the Xbox app but it would be nice to see this updated for that.

Can you please update this for the new castlevania dlc? its very glitchy

Would also really appreciate an update for the Castlevania DLC

Are there any plans to update this for the current version?

Adding my vote: Would greatly appreciate it if you updated for the Castlevania DLC!

pls 5120x1440

A shame this hasn't been updated in years

A shame this mod was abandoned 2 years ago, it doesn't work now

2k24 newest steam version, windows - still works

ITS WORKING Y'ALL! 🙂

As of 5/23/2025, this ultrawide fix works by editing one of the shader files used by Dead Cells. After extracting the mod (https://community.pcgamingwiki.com/files/file/2504-dead-cells-ultrawide-fix/), in each folder (only need 1 of the 4), you should have three files and one folder:

• d3d11.dll
• d3dcompiler_46.dll
• d3dx.ini
• ShaderFixes (folder)

Inside the ShaderFixes folder, there will be a file named:

• cc2a82ee0453aea8-vs_replace.txt

Open that file in a text editor and look for the following lines:

• if (o0.x > X1_OFFSET) { o0.x += X2_OFFSET; }
  else if (o0.x < -X1_OFFSET) { o0.x -= X2_OFFSET; }

Replace X1_OFFSET and X2_OFFSET (these are actual numbers in the file) with the values that match your resolution from the table below. ... anything works, this should be enough to determine your preferred ratio, just do the math if you don't see yours. 😉

Resolution === Aspect Ratio === X1_OFFSET === X2_OFFSET
2560x1080  === 21:9         === 0.799     === 0.22
3440x1440  === 21:9         === 0.789     === 0.21
3840x1600  === 21:9         === 0.747     === 0.25
3840x1080  === 32:9         === 0.494     === 0.52
5120x1440  === 32:9         === 0.494     === 0.52
3840x1200  === 32:10        === 0.622     === 0.38
5120x2160  === 64:27        === 0.494     === 0.52
5760x1080  === 48:9         === 0.329     === 0.68
7680x1440  === 48:9         === 0.329     === 0.68
6880x2880  === 43:18        === 0.399     === 0.60

These values define where the game begins stretching the scene to fill a wider aspect ratio (X1), and how far it pulls those edges outward (X2). Picking the right pair ensures you get a wider field of view without breaking the UI.

***Important***: Be sure to run the game in Maximized Windowed Mode, not Fullscreen or Borderless, to avoid HUD stretching. This setting preserves UI integrity while allowing proper ultrawide rendering.

After you edit the offset values, save. Then drag the follow files/folders into C:\Program Files (x86)\Steam\steamapps\common\Dead Cells and enjoy!

• d3d11.dll
• d3dcompiler_46.dll
• d3dx.ini
• ShaderFixes (folder)
  • cc2a82ee0453aea8-vs_replace.txt

On 5/23/2025 at 9:36 AM, weareborg said:

ITS WORKING Y'ALL! 🙂

As of 5/23/2025, this ultrawide fix works by editing one of the shader files used by Dead Cells. After extracting the mod (https://community.pcgamingwiki.com/files/file/2504-dead-cells-ultrawide-fix/), in each folder (only need 1 of the 4), you should have three files and one folder:

• d3d11.dll
• d3dx.ini
• nvapi64.dll
• ShaderFixes (folder)

Inside the ShaderFixes folder, there will be a file named:

• cc2a82ee0453aea8-vs_replace.txt

Open that file in a text editor and look for the following lines:

• if (o0.x > X1_OFFSET) { o0.x += X2_OFFSET; }
  else if (o0.x < -X1_OFFSET) { o0.x -= X2_OFFSET; }

Replace X1_OFFSET and X2_OFFSET (these are actual numbers in the file) with the values that match your resolution from the table below. ... anything works, this should be enough to determine your preferred ratio, just do the math if you don't see yours. 😉

Resolution === Aspect Ratio === X1_OFFSET === X2_OFFSET
2560x1080  === 21:9         === 0.799     === 0.22
3440x1440  === 21:9         === 0.789     === 0.21
3840x1600  === 21:9         === 0.747     === 0.25
3840x1080  === 32:9         === 0.494     === 0.52
5120x1440  === 32:9         === 0.494     === 0.52
3840x1200  === 32:10        === 0.622     === 0.38
5120x2160  === 64:27        === 0.494     === 0.52
5760x1080  === 48:9         === 0.329     === 0.68
7680x1440  === 48:9         === 0.329     === 0.68
6880x2880  === 43:18        === 0.399     === 0.60

These values define where the game begins stretching the scene to fill a wider aspect ratio (X1), and how far it pulls those edges outward (X2). Picking the right pair ensures you get a wider field of view without breaking the UI.

***Important***: Be sure to run the game in Maximized Windowed Mode, not Fullscreen or Borderless, to avoid HUD stretching. This setting preserves UI integrity while allowing proper ultrawide rendering.

After you edit the offset values, save. Then drag the follow files/folders into C:\Program Files (x86)\Steam\steamapps\common\Dead Cells and enjoy!

• d3d11.dll
• d3dx.ini
• nvapi64.dll
• ShaderFixes (folder)
  • cc2a82ee0453aea8-vs_replace.txt

When you say Maximized Windowed Mode, do you mean "Fullscreen Windowed"?  I downloaded the files to play this at 5120x1440 so I used these as the offsets:
5120x1440  === 32:9         === 0.494     === 0.52

My problem is that my UI is being stretched per the screenshot (using the Castlevania DLC on Steam btw).  This is in Fullscreen Windowed mode:

And this is in Windowed mode maximized (it loses the widescreen effect):

I did notice that the file "nvapi64.dll" doesn't seem to exist in the provided download.  Instead, I have "d3dcompiler_46".  Not sure if this has anything to do with it.  Hopefully I can get this sorted.  Appreciate you, thanks.

On 6/6/2025 at 11:20 PM, mikeyakson said:

When you say Maximized Windowed Mode, do you mean "Fullscreen Windowed"?  I downloaded the files to play this at 5120x1440 so I used these as the offsets:
5120x1440  === 32:9         === 0.494     === 0.52

My problem is that my UI is being stretched per the screenshot (using the Castlevania DLC on Steam btw).  This is in Fullscreen Windowed mode:

And this is in Windowed mode maximized (it loses the widescreen effect):

I did notice that the file "nvapi64.dll" doesn't seem to exist in the provided download.  Instead, I have "d3dcompiler_46".  Not sure if this has anything to do with it.  Hopefully I can get this sorted.  Appreciate you, thanks.

(>^.^)><3 
Thanks for catching the copy/paste error. I've corrected my post to "d3dcompiler_46" rather than "nvapi64.dll".

For your UI Stretch problem, you need to play in windowed mode, then maximize (as you have done). The reason you are losing the super ultra widescreen effect is because your:

• if (o0.x > X1_OFFSET) { o0.x += X2_OFFSET; }
  else if (o0.x < -X1_OFFSET) { o0.x -= X2_OFFSET; }

It needs tweaking, as its based on the window's X:Y ratio (not pixels) and its easy to get it off by a bit. If you're using windows 11 (like me) then your tool bar is fixed to the bottom. I've added software to allow me move my tool bar to right alignment (like in windows 10 & prior). This creates a small difference in our window's ratios, so you (and most people) need bust out the calculator or guess until it looks good. Please share your maths here if you get it looking pretty.

To provide some assurance it will work, play in windowed (but don't maximize), then click and drag the window until it is in a true 32:9 ratio. See attached gif for evidence its working with "Return to Castlevania" DLC.

LMK if this helps!

On 6/11/2025 at 6:54 PM, weareborg said:

(>^.^)><3 
Thanks for catching the copy/paste error. I've corrected my post to "d3dcompiler_46" rather than "nvapi64.dll".

For your UI Stretch problem, you need to play in windowed mode, then maximize (as you have done). The reason you are losing the super ultra widescreen effect is because your:

• if (o0.x > X1_OFFSET) { o0.x += X2_OFFSET; }
  else if (o0.x < -X1_OFFSET) { o0.x -= X2_OFFSET; }

It needs tweaking, as its based on the window's X:Y ratio (not pixels) and its easy to get it off by a bit. If you're using windows 11 (like me) then your tool bar is fixed to the bottom. I've added software to allow me move my tool bar to right alignment (like in windows 10 & prior). This creates a small difference in our window's ratios, so you (and most people) need bust out the calculator or guess until it looks good. Please share your maths here if you get it looking pretty.

To provide some assurance it will work, play in windowed (but don't maximize), then click and drag the window until it is in a true 32:9 ratio. See attached gif for evidence its working with "Return to Castlevania" DLC.

LMK if this helps!

You were right about tweaking it.  This is what worked for me with the Windows 10 taskbar on the bottom of the screen and not on autohide:

if(o0.x > 0.465){o0.x += 0.535;}else{
     if(o0.x < -0.465){o0.x -= 0.535;}

Thanks for the advice!  It's nearly perfect.  The only thing I notice now is that there is pop in textures and text that is not usually rendered is blurred.  Do you know if any of the settings in the ShaderFixes file increase the render distance?  Would love to have my cake and eat it too. :)