Graphics Issues such as horizontal or vertical lines and distortion are usually caused due to insufficient graphics card hardware capacity or incompatible, outdated drivers.
Check your system information using dxdiag and ensure your system meets the following -
2Moons Minimum Requirements:

Microsoft Windows 98/2000/XP
Intel Pentium III 800 MHz or AMD Athlon 800 MHz
256 MB or more of RAM
32 MB 3D graphics card with Hardware Transform and Lighting, such as nVIDIA
GeForce 2 class card or above
DirectX 9.0c and latest video drivers
Broadband Internet connection

2Moons Recommended System:

Microsoft Windows 98/2000/XP
Intel Pentium IV 1.5 GHz or AMD AthlonXP 1.5 GHz
512 MB or more of RAM
128 MB 3D graphics card with Hardware Transform and Lighting, such as nVIDIA
GeForce FX class card or above
DirectX 9.0c and latest video drivers
Broadband Internet connection

If your graphics card and computer meets the above requirements, try the following steps-

* Update your graphics card drivers. For more detailed instructions click HERE

* Ensure that you have the latest version of DirectX (9.0X or 10) installed.

* Reduce your 2Moons graphics settings-

Launch the game, after you have logged into the server press the 'Esc' key on your keyboard and choose options. Click on the tab 'Graphic', remove the ticks from all the options/effects from the window and reduce the quality. Do the same under the tab 'Graphics II'.




If your graphics card does not meet the above requirements, you may have to purchase a new graphics card

There are several types of 3D cards ranging from low to high end available in the market today which may or may not be compatible with your PC.

You must contact your system manufacturer or vendor to find out which cards are suitable and compatible with your PC for installation before you make your choice.