Cladun unfortuately has a couple of issues related to scaling and v-sync when running in fullscreen that seem to affect most users. I've tested these fixes with my Nvidia card and they work perfectly, so I'm hoping they will also work for everyone else.

I'm looking for feedback from AMD and Intel HD users on whether these fixes work for those GPUs. Please leave a comment letting me know if you're still having problems and I will update the guide if necessary.

If your monitor's resolution is higher than 1280x720 and the game isn't covering the entire screen, here's how to fix that:

- Right-click anywhere on your desktop and select NVIDIA Control Panel.
- Expand the Display menu on the left and select Adjust desktop size and position.
- Under the Scaling tab, make sure the Aspect Ratio option is selected, Perform scaling on is set to GPU, and the box for Override the scaling mode set by games and programs is checked. Then click Apply and close the window.

(I don't have an AMD card, so this is just a best-guess. Please let me know if it doesn't work.)

- Right-click anywhere on your desktop and select AMD Catalyst Control Center.
- Expand My Digital Flat Panels menu on the left and select Properties.
- Under Image Scaling Preferences, check the box for Enable GPU up-scaling and select Scale image to full panel size. Then click Apply and close the window.

Many people in the forum have suggested disabling v-sync. That will fix the flickering but results in awful screen tearing and jerky animation.

Instead you can use a frame rate limiter to keep the FPS at 60 or lower, which will eliminate the flickering while still allowing v-sync to maintain a smooth image.

Nvidia's GPU driver has a built-in frame rate limiter:

- Right-click anywhere on your desktop and select NVIDIA Control Panel
- In the left side panel, click Manage 3D Settings
- Click the Program Settings tab
- Click the Add button
- In the new window, click Browse...
- Navigate to where ClaDun X2 is installed, and select CladunX2.exe
- Now in the settings window, scroll down to the Max Frame Rate setting and change it from Use global setting to On and enter 60 in the target box

- Download and install the latest version of RivaTuner Statistics Server[www.guru3d.com] (scroll down the page a little to see the download links). RTSS is freeware and has been in development for a long time. It's a very useful tool to have.

- Run RTSS and click the icon in the taskbar so you can see the main window.
- Click the Add button on the bottom-left corner.
- Navigate to the ClaDun X2 installation folder and double-click CladunX2.exe so it appears in the list, and make sure it is the highlighted profile.
- Type 60 in the Framerate limit box on the right and press Enter. You can minimize RTSS, but don't close it - It needs to be running for the change to take effect.


That should do it. Depending on your GPU, you may still see an occasional flicker while playing Cladun. If that happens, just go back to the RTSS profile and change the limit from 60 to 59, which will eliminate the problem completely.

I hope these solutions work for you. If you have any problems or questions, please leave a comment and I will try my best to help.