Download and install the (separate) high definition sound packages for Descent 1 and 2 and enable hi def sound in d2x.ini.nSee the installation instructions for details.

D2X-XL multiplayer is generally incompatible with other Descent versions

Install the Microsoft Visual C++ 2008 SP Redistributable Package (x86) for the 32 bit or (X64) for the 64 bit versions of the program

This is a fullscreen issue. Edit d2x.ini and set '-fullscreen 0' there

Try to turn off midi music playback with the command line switch -nomusic (can be placed in d2x.ini)

Add the switch '-midifix 1' to d2x.ini

install or update to the latest d2x-xl data (particularly d2x-xl.hog) and delete the contents of d2x-xl's cache folder

Try to decrease max. lights/pass in the render options until it works. Many older graphics cards and apparently even current NVidia hardware cannot handle more than 6 lights/pass.

Either set -hires_sound 0 in d2x.ini, or install hires sounds as described in the installation guide.

Make sure to organize all Descent data in folders as described in the installation guide.

grep for all occurrences of glDrawRangElements in the source and remove the #ifdef _WIN32 ... #endif around them. Your system lacks the OpenGL headers containing that function specification (you probably need to update them. Try to install the latest MESA package).

This is caused by Vista's audio enhancements. to turn them off, open the control panel, chose sound, click on the speakers/headphones box below, then click on properties, select the enhancements tab, and finally check the disable all enhancements box.

Delete the corresponding *-256.tga and/or *-128.tga files in your models or textures folder to make D2X-XL recompute them.

Decrease image quality in the render options menu. At the highest setting, each texture has 512x512 pixels. Decreasing image quality to 'high' still gives you 256x256 pixels, which means a very acceptable degradation in visual quality while cutting memory requirements by 75%. If that is not enough, try to remove the animated textures first (switches, panels, doors in that sequence), as these are the worst memory hogs due them containing multiple images (animation frames). Total memory requirement with highest texture quality is around 480 MB for Descent 2:Counterstrike Level 1 when using hires textures, and around 300 MB with 'high' texture quality.

This usually means that either D2X-XL doesn't find the Descent 2 data or that some required system files are missing on your system. Try to install the required runtime libraries (see above).

Make sure cameras are turned on and enable backwards compatible camera handling by adding '-render2texture 0' to d2x.ini.

Old Descent 1 savegames don't work with the current D2X-XL anymore because the Descent 1 texture handling has been changed. Proceed to the next level, or start from a save game int16_t before finishing the previous level.

Put a semicolon in front of the line '-640x480' in d2x.ini.

Turn off 'smart weapon switch' in the gameplay options menu.

Press PrtScrn (German: Druck).

If the gamelist screen says that there are 0 trackers available, then D2X-XL couldn't find any trackers. Otherwise this probably means that nobody is offering a game via the trackers you are using. See the tracker page for info how to test tracker functionality.

Either change the frame rate in the render options menu so that it is not set to 'none' or 'v-sync', or enable v-sync in your graphics driver.

Configure your weapon hotkeys (Options -> Controls -> Configure Weapon Hotkeys).

Your mouse driver may be mapping the extra mouse keys to keyboard commands. Either use the keys they are mapped to, or change the driver settings.

A few versions of D2X-XL (around v1.5.6X) had a severe flaw in the save game format, leading to random memory being overwritten when loading these save games. Fixing this bug made these save games unusable.

This can happen with big faces (wall areas) in basic or standard lighting modes. Use high or best lighting quality to achieve better visuals

Certain textures (doors, grates), which are usually used as overlay textures on some base texture, have a special kind of transparency meaning that transparent areas in these textures are promoted to their underlying textures. This makes sense: Just think of the openings in grates, where you wouldn't want to see the base texture, but want to see through the base texture as well. This is called 'super transparency' in Descent. Super transparent pixels have a special color (e.g. purple, as you can e.g. see in DLE-XP). Under certain circumstances, such textures are rendered using a pixel shader. Now the pixel shader only gets active after anti-aliasing has taken place. Anti-Aliasing can and will change color values particularly at sharp edges like door openings. This leads to some pixels loosing their original super transparency color key, this in turn leading to super transparency not being applied for them. Hence the miscolored lines at door openings. Multitexturing via pixel shaders is enabled when turning hires texture usage on.

Edit the file d2x.ini from your Descent folder and add '-use_shaders 0'.

Mouselook greatly increases response of the ship to mouse movements. Fast pitch doubles the vertical turning speed (nose up/down), which by default is half of the horizontal turning speed (heading). I felt their introduction was justified, as a mouse user has a disadvantage compared to joystick players because he cannot make the ship continuously turn. To please everybody, you can however turn mouselook off, and in multiplayer games, it is controlled by the game host (server): If he turns it off, no participant can use it. If he turns it on, participants can still individually turn it off locally. Finally, if the game host doesn't use D2X-XL, D2X-XL detects it and turns off mouselook as well. Mouselook is *off* by default, so won't be accidentally available when it's not desired.

Make sure X is running and is set to 32 bit mode

You can specify the drive letter where D2X-XL is looking for the redbook audios. See the switches section for details. Make sure to remove '-nocdrom' from d2x.ini.